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GrandAire Furnace is noisy or loud

01 - Clogged Air Filter
A clogged air filter can cause strange whistling or low humming noises. The air filter is a critical part of heating and cooling your home. Not only does it filter the circulated air you breathe, it also helps keep the furnace heat exchanger, air ducts, and air conditioner coil from clogging up. It is recommended to replace the air filter at least every 6 months or sooner depending on the conditions.
02 - GrandAire Furnace Blower Wheel
The blower wheel blows air out of the furnace and through the house. The blower wheel is attached to the blower motor shaft with a set screw. If the set screw is loose, the blower wheel will wobble on the motor shaft, and the wheel will be noisy as it turns. Check the set screw to ensure that it is properly tightened. Next, inspect the wheel for damage. If the blower wheel is damaged, replace it.
Required Part
Furnace Blower Wheel
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Most Common Solution
03 - GrandAire Furnace Blower Motor
Over time, the bearings in the blower motor wear out, causing the motor to become noisy. Some furnace motors can be lubricated—if your furnace motor can be lubricated, try lubricating it first. If lubricating the motor doesn’t solve the problem, or if your motor can’t be lubricated, replace the motor.
Required Part
Furnace Blower Motor
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Common Solution
04 - GrandAire Furnace Draft Inducer Motor
The draft inducer motor draws air into the burner and then exhausts it out the flue. If the motor bearings are worn out, the motor will be loud. If the draft inducer motor is unusually noisy, replace it.
Required Part
Furnace Draft Inducer Motor
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Common Solution
05 - GrandAire Furnace Draft Inducer Blower Wheel
The draft inducer blower wheel blows air through the burner system. Inspect the blower wheel for damage (such as a separated center hub or broken fins). If the blower wheel is damaged, replace it.
Required Part
Furnace Draft Inducer Blower Wheel
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Common Solution
06 - GrandAire Furnace Blower Wheel and Housing
Required Part
Furnace Blower Wheel and Housing
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Common Solution