The fan quit spinning but was still buzzing so i turned the unit off and then back on and turned the fan with a stick and it started spinning and keep spinning but there is no cold air coming out and every once in a while it brings the electricity levels down enough to dim the lights what is my solution
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sounds as though the contactor is not pulling in tightly. but it also spunds as though the fan or fans might be hitting some thing . check them out shut the unit down and spin the fans and see if you hear something. if not then it could well be a contator .. But as I think a bit more could be lose fan, or compressor is not setting on it isloator bushings .
If the fan is not running is the compressor not running also...if neither is running the possible reasons are 1..no power to outside unit...2..bad contactor on outside unit.is this buzzing if it is this indicates no power...3 bad capacitor,do both compressor and fan humm then quit humming and hum some more...4 high pressure switch has shut unit down because fan wasnt running if compressor was running but not fan....if your unit has this there will be a manual reset button where the lines come out of unit...if compressor was running and fan was not...1 bad fan...2 bad capacitor.. if you do not have any electrical knowhow i would recommend calling a hvac tech to come and fix unit...Thanks
Turn power off to unit first. Then Try going up on roof, and with a stick or similar, through vent slots, spin fan blade a few times, and then try to start again. Seen quite a few stuck in dead spot at motor, and this will sometimes get it off the dead spot if fan(motor) hasn't been run in a while. If it has been running, and just recently started doing this, Capacitor is probably gone but need to be careful working with it, so get back to me if spinning fan blade didn't do it. Would be helpful to have model and make of unit.
try spinning by hand when the unit make the buzzing sound. to see if the capacitor is bad. If the fan runs replace the cap. If not motor probably is bad. See if it spins freely. this is a good starting place. need to check if the buzzing is the contactor and there is no power to the condensor. The contactor will buzz even though the main breaker is off or tripped
The condensor fan should be sucking air from the top and blowing it through the coils, probably a counter clockwise direction. The buzzing/humming sound is confusing to me. A humming sound sounds like a motor that can not turn over to start. A starting capacity would be needed. Just because you changed it out last year does not mean it is good. A buzzing sound sounds like a contactor problem. Contactors buzz and after a while, they will fail. In any case, you can "stick start" the condensor fan PROVIDED you are sure the ac compressor is working (this is for a short and temporary use). Also, you may have a high load duty capacitor that assists in the unit running. This will affect your condensor fan operation if it is not good. Unless you know all the components and operations of ac electrical, I would highly recommend calling out a professional.
Hey there, ok, now if the fan is spinning and the compressor is buzzing, the compressor is locked up and needs to be replaced. If neither is running and the buzzing is coming from the control panel on the unit, it could be the contactor. Also there is a chance that the fan motor burned up, causing the compressor to fail so the fan would be off but the compressor is buzzing and locked up. If nothing is running also check the circuit breaker it could just be he conactor you are hearing. At that point you need to figure out why the breaker tripped. Let me know what you find out seth