Home AC Issues

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  #1  
Old 05-08-15, 06:48 PM
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Home AC Issues

I noticed our outside AC unit stopped working the other day. The fan wasn't spinning and there was an electrical humming noise. I did some reading and tried to spin the fan manually. The fan will spin and will continue spinning on it's own, but now the unit makes that same electrical hum but only for 1 second at a time in about 45 second intervals and it(the condenser?) won't ever actually kick on. Could it still be just the capacitor or is there likely something else wrong? If so, what next?

Thanks
JML
 
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  #2  
Old 05-08-15, 07:34 PM
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Welcome to the forums.

The fan must spin at normal speed to cool off the compressor. If it's turning slow it may need a capacitor or it may need to be replaced. Try replacing the fan cap first.

Right now it sounds like the compressor is cycling on overheat. That can't be allowed to continue or the compressor will be damaged.
 
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Old 05-08-15, 08:14 PM
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Thanks. I'll replace that and report back.
Here's a video of the sound. It comes around the 8 second mark.
http://i208.photobucket.com/albums/bb127/JLemKA24e/VIDEO_20150508_200201_zpsjbub0tq9.mp4
 
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Old 05-12-15, 08:11 AM
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Did you ever figure out the problem ??? I'm having the SAME EXACT thing, except the intervals are about 1 minute apart on the electrical humming noise.
 
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Old 05-12-15, 09:01 AM
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No, I work 11 days straight then 3 off so I haven't had a chance. It's not too warm here so it's been bearable.
 
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Old 05-12-15, 09:06 AM
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That's okay.

I'm going to change out my capacitor this evening and report back to see if the humming noise is gone. I'll report back with the results .
 
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Old 05-12-15, 09:11 AM
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Thanks, I'm really hoping that's all it is.
 
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Old 05-12-15, 09:27 AM
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It's the least expensive repair part so it makes the most sense to change it first. If it's not the fan capacitor then it's the actual motor.
 
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Old 05-12-15, 09:29 AM
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The actual motor in what ? the fan ? Like previously stated, the fan spins just fine once it's "pushed". Or you talking about the compressor motor ?!
 
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Old 05-12-15, 11:13 AM
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C'mon now leo....

If it's not the fan capacitor then it's the actual motor.
If it's not the fan capacitor then it's the actual fan motor.
 
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Old 05-12-15, 11:23 AM
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My fan spins once pushed but I don't feel like it's at full speed.
 
  #12  
Old 05-12-15, 12:30 PM
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JL,

just replaced it. Fan started right up with no "push", compressor working too. That's what that humming noise was, the compressor trying to turn on.

House currently at 82* upstairs. Set the thermometer down to 75*. We'll see how it goes.......
 
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Old 05-25-15, 04:32 PM
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Took out the capacitor today and the end is definitely ballooned out. Couldn't get a new one locally with the holiday being today so the new one will be here Wednesday from Amazon. Fingers crossed that it's the only problem.
 
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Old 05-27-15, 05:28 PM
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Capacitor replaced. AC is working now!
 
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