Question about Heating & Cooling
This roar sounds like the bearings going bad on the electric blower motor.. Does the unit cool just fine ? If so then the blower wheel that moves the air is rubbing against the cage and needs to be adjusted. Turn power off to the unit and remove the front cover where the motor is.. Spin the fan wheel by hand and see if it is hitting the sides.. If it is the cage with motor is being held in usually by one or two screws at the front on the top where the cage is suspending from. With theose removed the cage will slide out and usually wiring can stay connected. There will be a square head bolt that is keeping the blower wheel in place. Spray some penetrent on the threads and let sit for a few minutes. Then use a box end wrench or crescent wrench that is the correct size and loosen bolt by turning counter-clockwise.. WHen wheel will spin on shaft see if you can tap the blower wheel in the correct direction to loosen from hitting the cage. Connect everything back in the opposite manner of course.
Posted on Aug 29, 2010
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Posted on Jan 02, 2017
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