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A/C unit won't kick on

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When I adjust my electric thermostat, the fan on my outdoor unit won't turn on. There is an audible click

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Old 09-03-2008, 04:22 AM
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Unhappy A/C unit won't kick on
Brand: GE   Age: Less than 1 year   

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When I adjust my electric thermostat, the fan on my outdoor unit won't turn on. There is an audible click at the outside unit however, which leads me to believe it's the relay that's not getting my fan started.

I've tried manually pushing the fan and it moves without restrictions in EITHER direction. Once it begins, it continues at the same speed under it's own power.

Before I tear this thing apart (and I am hesitant to do so as I know very little about electricity or AC units) I want to make sure I am looking in the right place.

I've also taken the panel off and written down the numbers off of the relay presently there, and cannot find any matches for them online. It's a GE relay and the codes on it are: CR453CC3HLLAY and 024-27531-000

Any assistance anyone can give is most appreciated. It's still hot here in Maryland, and the wife's about to mutiny over this AC problem.


Last edited by DSMarti : 09-03-2008 at 04:24 AM. Reason: The age of the unit should be 4 years, not 1.
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Old 09-14-2008, 03:24 PM
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Default Might be the Cap!

It sounds like you may have a bad capacitor. The capacitor is a metal can or cylinder with terminals on one end. It should be located under a cover panel on the outside unit. If the unit uses a dual capacitor it will have three terminals on it (most common). The three terminals will be HERM, FAN, and C (stamped into the metal next to each terminal). The herm terminal is the start assist for you compressor the C is common and the FAN is the start assist for the condenser fan motor. Caps are not easy to check but they are fairly cheap, $15 to $20.
The clicking sound you hear may be the contactor (switch) that provides power to the compressor. If you are inclined to replace the cap take the following precautions. Disconnect the power to the outside unit (trip the breaker or pull the service disconnect). Discharge any stored charge in the cap by touching a screwdriver across the terminals, then go ahead and replace the cap.

Hope this helps!
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Old 09-14-2008, 09:37 PM
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If it's less than a year old call a authorized tech to have it checked, if you haven't already voided your warranty.
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Old 09-28-2008, 08:24 AM
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Quote:
Originally Posted by ebconn View Post
It sounds like you may have a bad capacitor. The capacitor is a metal can or cylinder with terminals on one end. It should be located under a cover panel on the outside unit. If the unit uses a dual capacitor it will have three terminals on it (most common). The three terminals will be HERM, FAN, and C (stamped into the metal next to each terminal). The herm terminal is the start assist for you compressor the C is common and the FAN is the start assist for the condenser fan motor. Caps are not easy to check but they are fairly cheap, $15 to $20.
The clicking sound you hear may be the contactor (switch) that provides power to the compressor. If you are inclined to replace the cap take the following precautions. Disconnect the power to the outside unit (trip the breaker or pull the service disconnect). Discharge any stored charge in the cap by touching a screwdriver across the terminals, then go ahead and replace the cap.

Hope this helps!
Capacitors are easily tested with an "Ohm" meter. Disconect power. Remove the leads from the terminals (mark them). Place one lead on each terminal, and watch reading. It should go up,then slowly down. If it does not move or stays up capacitor is bad.
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