Ac unit is humming fan is not turning
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,
also,if humming is came from compressor,definitely because
fan is to reject heat,if no fan compressor will hum due to refrigferant in the system is not flowing,on high side,have this check by a/c technician nearewst on you.have a nice day dont fforget to rate me ,thank's
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