Question about Carrier Heating & Cooling
Ac making buzzing/humming noise when thermostat is turned to the cooling temperature. Fan is not spinning on it's own but I can take a stick to turn it to start it. Capacitor and motor replaced last year. Which direction should it be turning? It will stick start in both directions. Clockwise will blow a lot of air out of the top, but it seems a bit cooler than usual (it's night time maybe?). Counter clockwise will not really blow out the top any air. The motor housing is warmer than it should be this late at night. How do I know which way it should be turning? I don't think the ac in the house either direction is blowing air that is very cool and the thermostat is maintaining, not lowering like it should. I'm hoping if I can keep it spinning in the right direction it will cool the house down a bit for the night until I can fix it tomorrow. (cap. /maybe motor) My wife has MS and can't get hot. Anyone up this late? HELP!
1. Which direction should the fan blades be spinning?
2. One direction blows a lot of air out top like usual but not warm air (it's evening?) the other direction spins doesn't reallly blow any air out the top of unit.
3. Does this sound like the capacitor and how can I tell if my compressor is shot?
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.
Posted on Jun 26, 2009
I am sorry but I have to disagree with what the other guy said.
First, all condensing units suck in through the coils and blow out the top. (it's probably the capacitor why the fan motor wont run.)
Second, you mentioned that it was not warm air like you expected-again the capacitor because on these units the capacitor is a dual job that connects to the fan and the compressor. If it's bad the compressor will just sit there and its casing will get hot.
(it is a bit unusual for both sides of a capacitor to go out so make sure and check for loose wires-in particular the black wire in this case.)
The buzzing sound could be the motor trying to work with a bad capacitor, or it could be the contactor buzzing-no big deal either way, once you fix it that will go away.
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Posted on Jan 02, 2017
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