You can hear your air handler’s blower motor running but the blower doesn’t move any air. You go to one of the supply air registers and no air is coming out of it. The belt that connects from the blower motor to the squirrel like cage has either fallen off or it has broken. Replacing the belt is an easy fix if you have a few tools and some do it yourself skills.
This is how you replace the air conditioner’s blower belt:
- Turn off the power to the unit by finding the safety switch located on the side of the air handler’s cabinet.
- If the air handler is a gas furnace, turn off the gas by finding the gas valve lever located on the black gas pipe next to the air handler unit.
- Remove the door on the front of the air-handler cabinet to give you access to the blower motor. If your air handler has two doors, it would be the bottom door to remove. Reach in and grab the belt. Find the number stamped on the belt and get an exact replacement from a home center or heating supply house.
- First you can slip the belt on the motor’s (smaller) pulley. Then place the belt onto the blower pulley. Rotate the blower pulley by hand, holding the belt in place but keeping your fingers from getting caught between the belt and the pulley. The belt should slip right into place. If it is very tight or hard to set into place, it might be necessary to adjust the motor mount to provide more slack. If it is too loose, it will be necessary to adjust the motor mount to provide more tension. Once the belt is in place tighten the mounts better. Look for the manufacturer’s specifications for the proper tension. As a good rule of thumb, the belt tension should deflect about an inch when you push down on it.
- Finally, the last step would be to lubricate or oil as needed. Some blower motors have sealed bearings where they can’t be oiled. If recommended by your owner’s manual, oil the bearings according to the manufacturer’s instruction.
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Richard Marton Electrical Contractor LLC is a full service electrical contractor serving homeowners and businesses in Bergen, Passaic, Essex and Morris County New Jersey with electrical installations and repairs. We are also a Generac Generator installer.
Richard Marton Electrical Contractor LLC works with general contractors, residential architects, interior decorators, interior designers, painters, property management and property maintenance professionals, and professional organizers. We work with these professionals to give clients top of the line electrical installations within such projects as residential remodeling, residential renovations, plus build outs of new kitchens, bathrooms, home offices, add-a-level residential project and more.