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03
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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. Refer to owner's manual for guidance.
Top Solution
02 - York 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.
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Highly Likely
03 - York Furnace Air Filter
The air filter is a critical part of heating and cooling the home. Not only does it filter the circulated air, it also helps keep the air ducts and the furnace coil from clogging up. Over time as the air filter collects dust and debris, it can start to produce strange whistling or low humming noises. Check and replace the air filter at least twice a year, more often in dusty/dirty environments or if there is a pet in the home.
Highly Likely
04 - York 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.
Highly Likely
05 - York 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.
Common
06 - York Furnace Flame Sensor
The flame sensor monitors the burner to detect whether or not a flame is present. A defective sensor might fail to detect a flame, causing the control board to shut off voltage to the gas valve to prevent the release of gas. Sometimes, if the flame sensor is dirty and only intermittently sensing the flame is present, the control board will shut off the gas and try to relight the burner several times which can result in a lot of unusual noises. Try cleaning the flame sensor with a fine abrasive pad. If the furnace still doesn’t light properly, replace the flame sensor.
Common
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