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Fan not turning, but motor is humming - Hampton Bay HBLG5004 Air Conditioner

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  • birchmeadow1 Jul 10, 2008

    fan not turning, but motor is humming ,I have oiled the shaft on the motor,it will turn if I spin it to get it started. Is the motor shot?

  • Anonymous Aug 01, 2008

    shaft is stuck


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I would deffinatly change the Capacitor. They are normally a dual run type. One terminal runs the fan motor, the other runs HERM or compressor & C terminal is the common for both. Capacitor can be either round or oval if space permits, but make sure the UF numbers & VAC numbers are the same. You can if you must go higher on the VAC number, but not lower. But is best to get exact values. Fan motors with oiled clean moving shaft that hum are either burnt out capacitor or fan motor winding is bad if capacitor change does not work. Avg cap. price is Aprox $16-$20.00.

Posted on Jul 21, 2008

Had this need new fan motor if capacitor is good...motor is overheating and the safety is kicking it off...replace

Posted on Jun 22, 2008

Might want to check the fan motor start capacitor

Posted on Jun 09, 2008

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  • 93 Answers

SOURCE: Compressor hums but fan not turning. Pushed fan to

cap most likley

Posted on Jul 16, 2009

  • 39 Answers


The run capacitor is probably bad. The run capacitor is usually a two part component. One part serves the fan and one part serves the compressor. Sometimes when they fail the fan will even run backwards instead of just stalling. Replace it.

Posted on Jan 13, 2009

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hi there,
defective fan motor,this means stuck up motor the running winding is functioning but it can't star to drive your motor so the current inside motor produce vibration that why it create humming, several causes to be consider, bearing are worn out,defective fan capacitor, the fan is obstructed by object.there is no supply on starting capacitor,check if there fan relay overload protection reset it on control panel,
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The run capacitor is probably bad. The run capacitor is usually a two part component. One part serves the fan and one part serves the compressor. Sometimes when they fail the fan will even run backwards instead of just stalling. Replace it.

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