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I have a carrier hotel heat and air wall unit, model #52sec312301 aa, date of mfg 2/28/97. installed and unit ran for 5hrs, when the fan motor quit (it only hums). I need information on how to repair if possible, or where to find a replacement motor.

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Chances are the capacitor is bad. Lets hope anyway right behind the control section is the capacitor it will be a dual one it runs the compressor and fan. First turn the breaker off for unit. access the capacitor make note of the wiring this is where it gets real difficult so many wires in a little space. make labels out of tape it you need to there are two sides to capacitor the fan should only have one wire going to fan side. remove the capacitor you can test the capacitor if you have volt ohm meter. Put in ohm's and check resistance on the fan side. If the meter goes up then down capacitor good. If it runs up and down reverse the leads from the ohm meter and repeat runs up and down. If that checks bad replace the capacitor. but other wise the Fan motor is bad and they are tuff to replace. Can be done but you have to undo the inner part from the outer shell and pulling the whole inside out. You will need long Allen wrenches. Have to remove alot of housing items. let me know what you check on capacitor. ken

Posted on Dec 07, 2008


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