Troubleshooting


Why does my circulator cycle on and off? Air Circulators a) The thermal protector may be tripping. Check for obstructions to airflow, voltage or excessive intake air temps. Above 104ºF. b) The wiring or control switch on the motor may be faulty. Replace or repair.
Why is my circulator not working? Air Circulators a) There may be a blown fuse or breaker. Replace or repair. b) The motor or switch may be defective. Replace or repair.
Why is my circulator so noisy? Air Circulators a) The propeller may be loose or damaged. Tighten or replace. b) The motor may not be secure. Tighten motor nuts.
Why won't my oscillating circulator oscillate? Air Circulators a) The oscillating mechanism may not be engaged. Turn the shaft clockwise until engaged. b) The gear assembly may be defective. Replace or repair.
My fan isn't moving as much air as I anticipated. Why? Bath/Ceiling Fans a) The duct may be blocked. Clear obstruction from duct. b) A duct may have collapsed or become perforated. Repair or replace duct section.
Why does my fan seem to be vibrating excessively? Bath/Ceiling Fans a) There may be an accumulation of material on the wheel. Clean the wheel. b) The fan wheel may be out of balance. Replace the wheel.
Why is my fan not working? Bath/Ceiling Fans a) There may be a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections.
Why is my motor overloading and shutting off? Bath/Ceiling Fans a) You may have the incorrect voltage input. Correct to 115 Volt. b) The motor may have a shorted motor winding. Replace the motor. c) There may be a build up of dust, dirt or other contaminants on the motor. Clean the motor.
My ventilator isn't moving as much air as I anticipated. Why? Belt-Drive Axial Downblast Exhaust Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The fan speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.
Why is my exhaust ventilator not working? Belt-Drive Axial Downblast Exhaust Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my fan moving more air than I anticipated? Belt-Drive Axial Downblast Exhaust Ventilators You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.
Why is my fan so noisy? Belt-Drive Axial Downblast Exhaust Ventilators a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) Your pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller. h) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.
Why is my motor overloading and shutting off? Belt-Drive Axial Downblast Exhaust Ventilators a) Your propeller RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
My ventilator isn't moving as much air as I anticipated. Why? Belt-Drive Axial Upblast Exhaust Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The propeller speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.
Why is my exhaust ventilator not working? Belt-Drive Axial Upblast Exhaust Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Belt-Drive Axial Upblast Exhaust Ventilators a) The propeller RPM is too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
Why is my ventilator moving more air than I anticipated? Belt-Drive Axial Upblast Exhaust Ventilators You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.
Why is my ventilator so noisy? Belt-Drive Axial Upblast Exhaust Ventilators a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller.
My ventilator isn't moving as much air as I anticipated. Why? Belt-Drive Centrifugal Downblast Exhaust Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) You may have a damper that is closed. Inspect and repair damper. d) The wheel speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open. e) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
Why is my exhaust ventilator not working? Belt-Drive Centrifugal Downblast Exhaust Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Belt-Drive Centrifugal Downblast Exhaust Ventilators a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) Your motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
Why is my ventilator so noisy? Belt-Drive Centrifugal Downblast Exhaust Ventilators a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley is not tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The wheel may be improperly aligned and rubbing. Center wheel on inlet. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. i) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. j) Your ventilator base may not be securely anchored. Secure your ventilator properly. k) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.
My ventilator isn't moving as much air as I anticipated. Why? Belt-Drive Centrifugal Upblast Exhaust Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The wheel speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open. e) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
Why is my exhaust ventilator not working? Belt-Drive Centrifugal Upblast Exhaust Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Belt-Drive Centrifugal Upblast Exhaust Ventilators a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
Why is my ventilator so noisy? Belt-Drive Centrifugal Upblast Exhaust Ventilators a) The wheel may be improperly aligned and rubbing. Center wheel on inlet. b) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. c) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. d) The ventilator base may not be securely anchored. Secure your ventilator properly. e) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.
My ventilator isn't moving as much air as I anticipated. Why? Belt-Drive Exhaust, Supply & Reversible Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The propeller speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.
Why is my motor overloading and shutting off? Belt-Drive Exhaust, Supply & Reversible Ventilators a) The propeller RPM is too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
Why is my ventilator moving more air than I anticipated? Belt-Drive Exhaust, Supply & Reversible Ventilators You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.
Why is my ventilator not working? Belt-Drive Exhaust, Supply & Reversible Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my ventilator so noisy? Belt-Drive Exhaust, Supply & Reversible Ventilators a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller.
My fan isn't moving as much air as it should. What do I do? Belt-Drive Sidewall Propeller Fans a) Check to make sure the belt is positioned properly. If belt is slipping, adjust tension and match belt to pulley. b) Verify that the damper is open. c) Check that the drive combination is correct.
Why is my fan moving more air than I anticipated? Belt-Drive Sidewall Propeller Fans You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.
Why is my fan not working? Belt-Drive Sidewall Propeller Fans a) There may be a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The electricity may be turned off. Contact local power company.
Why is my fan so noisy? Belt-Drive Sidewall Propeller Fans a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley is not tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored to the wall. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller.
Why is my fan supplying air rather than exhausting? Or vice versa? Belt-Drive Sidewall Propeller Fans a) The propeller rotation may be reversed. Reverse motor rotation by rewiring the motor. b) The fan may have the incorrect propeller. Verify pitch of prop is correctly positioned for the application.
Why is my motor overloading and shutting off? Belt-Drive Sidewall Propeller Fans a) The propeller RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
My blower isn't moving as much air as I anticipated. Why? Belt-Drive Spark-Resistant Kitchen Blowers a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) Your blower wheel may be running backwards. Correct, rotation should be clockwise and correspond to the rotation decal found on the unit. c) You may have excessive buildup of material on your wheel. Clean wheel. d) The wheel may be improperly aligned. Center wheel on inlet. e) Your blower speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.
Why is my blower moving more air than I anticipated? Belt-Drive Spark-Resistant Kitchen Blowers a) You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open. b) Your blower speed may be too high. Adjust motor sheave to decrease fan speed. c) Your duct work may be the wrong size. Resize duct work - access doors, filters, grilles not installed.
Why is my blower not working? Belt-Drive Spark-Resistant Kitchen Blowers a) There may be a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my blower so noisy? Belt-Drive Spark-Resistant Kitchen Blowers a) Your bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley is not tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The wheel may be improperly aligned and rubbing. Center wheel on inlet. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. i) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup. j) The motor, motor base or blower may not be securely anchored. Secure properly.
Why is my motor overloading and shutting off? Belt-Drive Spark-Resistant Kitchen Blowers a) The wheel RPM is too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
Why does my heater not operate and my unit does not attempt to light (no visible spark)? Direct Fired Makeup Air Heaters a) Your power may not be passing through the heating inlet air sensor (TS1). Adjust heating inlet air sensor (TS1). b) Your power may not be passing through the high limit (HLC1). Reset or replace your high limit (HLC1). c) The power may not be passing through the airflow switch. Correct the airflow across the burner by adjusting airflow switch (PS2).
Why does my heater not operate when my unit attempts to light with no flame (visible spark)? Direct Fired Makeup Air Heaters a) Your low fire may not be set properly. Adjust low fire setting (See direct gas operation in OIPM). b) The gas pressure between the min and max shown on the direct gas label may be incorrect. Correct the gas pressure (See direct gas operation in OIPM). c) There may be air in the gas line. Purge the gas line. d) The burner pressure drop across the burner may need to be adjusted. Adjust burner baffles (See direct gas operation in the OIPM). e) The spark may not be set properly. Uncross crossed flame and spark wires and reconnect. Reset spark plug gap to 0.062 inches. Replace defective spark plug.
Why is my blower not operating? Direct Fired Makeup Air Heaters a) The 24 Vac on the secondary of the main transformer (TR1) may not be working. Measure across A1-A2 on supply blower contractor. Check Main voltage - see blower Operation. Turn Main Disconnect (DS1) On if Off. Replace defective Main Transformer TR1. b) The Supply Starter (ST1) may not be energized. Reset tripped Supply Fan Overload (ST1 OL). Restore 1 or more missing legs of 3 phase. Replace defective Supply Starter c) The fan belt may be broken. Replace belt. d) The motor or capacitor may be defective. Repair or replace.
Why is my makeup heater so noisy? Direct Fired Makeup Air Heaters a) The belts may be worn or loose. Replace worn belts or tighten loose belts. b) The sheaves may not be properly aligned. Align sheaves. c) The wheel may be unbalanced. Clean excess debris from wheel or replace if necessary. d) The bearings may be worn or defective. Replace bearings. e) The wheel may be rubbing on the inlet. Adjust wheel or inlet.
My ventilator isn't moving as much air as I anticipated. Why? Direct-Drive Axial Downblast Exhaust/Supply Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
Why is my exhaust ventilator not working? Direct-Drive Axial Downblast Exhaust/Supply Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Direct-Drive Axial Downblast Exhaust/Supply Ventilators a) The motor may have a shorted motor winding. Replace motor. b) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. c) The power source may be over/under line voltage. Contact your local power company.
Why is my ventilator so noisy? Direct-Drive Axial Downblast Exhaust/Supply Ventilators a) The propeller may be loose. Tighten set screws. b) There may be an accumulation of material on the propeller. Clean propeller. c) The propeller may be out of balance. Replace propeller. d) The ventilator base may not be securely anchored. Secure your ventilator properly. e) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.
My ventilator isn't moving as much air as I anticipated. Why? Direct-Drive Centrifugal Downblast Exhaust Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) Your duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
Why is my exhaust ventilator not working? Direct-Drive Centrifugal Downblast Exhaust Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Direct-Drive Centrifugal Downblast Exhaust Ventilators a) The motor may have a shorted motor winding. Replace motor. b) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. c) The power source may be over/under line voltage. Contact your local power company.
Why is my ventilator so noisy? Direct-Drive Centrifugal Downblast Exhaust Ventilators a) The wheel may be improperly aligned and rubbing. Center wheel on inlet. b) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. c) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. d) The ventilator base may not be securely anchored. Secure your ventilator properly. e) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.
My ventilator isn't moving as much air as I anticipated. Why? Direct-Drive Centrifugal Upblast Exhaust Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) Your duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
Why is my exhaust ventilator not working? Direct-Drive Centrifugal Upblast Exhaust Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Direct-Drive Centrifugal Upblast Exhaust Ventilators a) The motor may have a shorted motor winding. Replace motor. b) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. c) The power source may be over/under line voltage. Contact your local power company.
My ventilator isn't moving as much air as I anticipated. Why? Energy Recovery Ventilators a) The fan wheel may be operating backwards. Check for correct rotation and adjust if necessary. b) The filters and/or energy wheel may be dirty. Replace filters and/or follow the cleaning procedures found in the OIPM. c) Your system may have too much static pressure. Check than fan to duct connections are correct and make sure dampers are open appropriately.
Why does my energy wheel run irregularly? Energy Recovery Ventilators a) The wheel motor overloads may be tripping due to rubbing between the wheel and air seals. Recheck air seals and make sure they are not too tight. See Energy Recovery Wheel section in OIPM.
Why doesn't my energy wheel turn? Energy Recovery Ventilators a) The air seals may be too tight. See Energy Recover Wheel section in the OIPM. b) There may be no power to the wheel motor. Make sure the wheel drive is plugged in/connected and verify that power is available. c) The wheel belt may be loose or broken. Adjust belt tension or replace if necessary.
Why is my energy recovery ventilator so noisy? Energy Recovery Ventilators a) The fan wheel may be rubbing on the inlet. Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft. b) The bearings may be loose defective. Tighten collars and fasteners or replace bearings. c) The fan wheel may be out of balance. Remove any excess build up on wheel or replace if necessary.
Why will my energy recovery ventilator not operate? Energy Recovery Ventilators a) You may have a blown a fuse or breaker. Repair or replace. b) The switch may be in the OFF position. Turn switch to ON position. c) The unit may be wired incorrectly. Shut power OFF and check wiring for proper connections. d) The motor horse power may be too large. Check that motor horse power is correct and not tripping overloads.
My ventilator isn't moving as much air as I anticipated. Why? Filtered Supply Ventilators a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The wheel speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open. e) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
Why is my exhaust ventilator not working? Filtered Supply Ventilators a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? Filtered Supply Ventilators a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
Why is my ventilator so noisy? Filtered Supply Ventilators a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley is not tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The wheel may be improperly aligned and rubbing. Center wheel on inlet. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) Your pulleys may not be aligned correctly. Re-align pulleys. h) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. i) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. j) The ventilator base may not be securely anchored. Secure your ventilator properly.
My blower isn't moving as much air as I anticipated. Why? In-Line Duct Blowers a) Your system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The blower wheel may be running backwards. Correct, rotation should be clockwise and correspond to the rotation decal found on the unit. c) You may have excessive buildup of material on your wheel. Clean wheel. d) The wheel may be improperly aligned. Center wheel on inlet.
Why is my blower so noisy? In-Line Duct Blowers a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The wheel may be improperly aligned and rubbing. Center wheel on inlet. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. i) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup.
Why is my in-line duct blower not working? In-Line Duct Blowers a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The electricity may be turned off. Contact local power company.
Why is my motor overloading and shutting off? In-Line Duct Blowers a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.

Why does my circulator cycle on and off?

Air Circulators

a) The thermal protector may be tripping. Check for obstructions to airflow, voltage or excessive intake air temps. Above 104ºF. b) The wiring or control switch on the motor may be faulty. Replace or repair.

Why is my circulator not working?

Air Circulators

a) There may be a blown fuse or breaker. Replace or repair. b) The motor or switch may be defective. Replace or repair.

Why is my circulator so noisy?

Air Circulators

a) The propeller may be loose or damaged. Tighten or replace. b) The motor may not be secure. Tighten motor nuts.

Why won't my oscillating circulator oscillate?

Air Circulators

a) The oscillating mechanism may not be engaged. Turn the shaft clockwise until engaged. b) The gear assembly may be defective. Replace or repair.

My fan isn't moving as much air as I anticipated. Why?

Bath/Ceiling Fans

a) The duct may be blocked. Clear obstruction from duct. b) A duct may have collapsed or become perforated. Repair or replace duct section.

Why does my fan seem to be vibrating excessively?

Bath/Ceiling Fans

a) There may be an accumulation of material on the wheel. Clean the wheel. b) The fan wheel may be out of balance. Replace the wheel.

Why is my fan not working?

Bath/Ceiling Fans

a) There may be a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections.

Why is my motor overloading and shutting off?

Bath/Ceiling Fans

a) You may have the incorrect voltage input. Correct to 115 Volt. b) The motor may have a shorted motor winding. Replace the motor. c) There may be a build up of dust, dirt or other contaminants on the motor. Clean the motor.

My ventilator isn't moving as much air as I anticipated. Why?

Belt-Drive Axial Downblast Exhaust Ventilators

a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The fan speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.

Why is my exhaust ventilator not working?

Belt-Drive Axial Downblast Exhaust Ventilators

a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.

Why is my fan moving more air than I anticipated?

Belt-Drive Axial Downblast Exhaust Ventilators

You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.

Why is my fan so noisy?

Belt-Drive Axial Downblast Exhaust Ventilators

a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) Your pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller. h) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.

Why is my motor overloading and shutting off?

Belt-Drive Axial Downblast Exhaust Ventilators

a) Your propeller RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.

My ventilator isn't moving as much air as I anticipated. Why?

Belt-Drive Axial Upblast Exhaust Ventilators

a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The propeller speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.

Why is my exhaust ventilator not working?

Belt-Drive Axial Upblast Exhaust Ventilators

a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.

Why is my motor overloading and shutting off?

Belt-Drive Axial Upblast Exhaust Ventilators

a) The propeller RPM is too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.

Why is my ventilator moving more air than I anticipated?

Belt-Drive Axial Upblast Exhaust Ventilators

You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.

Why is my ventilator so noisy?

Belt-Drive Axial Upblast Exhaust Ventilators

a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller.

My ventilator isn't moving as much air as I anticipated. Why?

Belt-Drive Centrifugal Downblast Exhaust Ventilators

a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) You may have a damper that is closed. Inspect and repair damper. d) The wheel speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open. e) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.

Why is my exhaust ventilator not working?

Belt-Drive Centrifugal Downblast Exhaust Ventilators

a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.

Why is my motor overloading and shutting off?

Belt-Drive Centrifugal Downblast Exhaust Ventilators

a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) Your motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.

Why is my ventilator so noisy?

Belt-Drive Centrifugal Downblast Exhaust Ventilators

a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley is not tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The wheel may be improperly aligned and rubbing. Center wheel on inlet. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. i) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. j) Your ventilator base may not be securely anchored. Secure your ventilator properly. k) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.

My ventilator isn't moving as much air as I anticipated. Why?

Belt-Drive Centrifugal Upblast Exhaust Ventilators

a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The wheel speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open. e) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.

Why is my exhaust ventilator not working?

Belt-Drive Centrifugal Upblast Exhaust Ventilators

a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.

Why is my motor overloading and shutting off?

Belt-Drive Centrifugal Upblast Exhaust Ventilators

a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The wheel may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.

Why is my ventilator so noisy?

Belt-Drive Centrifugal Upblast Exhaust Ventilators

a) The wheel may be improperly aligned and rubbing. Center wheel on inlet. b) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. c) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. d) The ventilator base may not be securely anchored. Secure your ventilator properly. e) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.

My ventilator isn't moving as much air as I anticipated. Why?

Belt-Drive Exhaust, Supply & Reversible Ventilators

a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The propeller may be running backwards. Correct rotation. c) There may be a damper that is closed. Inspect and repair damper. d) The propeller speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open.

Why is my motor overloading and shutting off?

Belt-Drive Exhaust, Supply & Reversible Ventilators

a) The propeller RPM is too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.

Why is my ventilator moving more air than I anticipated?

Belt-Drive Exhaust, Supply & Reversible Ventilators

You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.

Why is my ventilator not working?

Belt-Drive Exhaust, Supply & Reversible Ventilators

a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.

Why is my ventilator so noisy?

Belt-Drive Exhaust, Supply & Reversible Ventilators

a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley may not be tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller.