outside AC unit is not cooling, makes a buzzing noise every couple minutes.

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Old 06-17-14, 05:10 PM
J
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outside AC unit is not cooling, makes a buzzing noise every couple minutes.

My central air conditioning unit is not cooling. I went to check the outside unit, and the fan is spinning, but I can't tell if the compressor is turning on. But every couple of minutes it makes a buzz noise.
A couple of weeks ago, my breaker box got wet, were not sure how, but a lot of the breakers were full of water. Since then the AC breaker made a loud buzzing noise in the same intervals as the outside unit. We replaced the breaker, and the buzzing inside stopped, but the outside unit still makes a buzz noise, and the air in the house is warm.
I just wanted to know if there was a way to fix this myself, or if I should just give up and call somebody. Normally my dad would be able to fix this, but he's currently away for a couple of months and I'm here by myself. I have a little experience working with window units, but never with central units, so my knowledge is minimal. So if it's much too complicated, I may not be able to do it myself.
 
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Old 06-17-14, 06:58 PM
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Open the electrical panel to the outdoor unit and look for burned wires or a capacitor that is swollen on top.



This cap is very swollen but even a little swollen is bad.


Capacitors do not always swell on top when they are bad but they always require replacement if swollen.
 
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Old 06-18-14, 01:10 PM
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I replaced the capacitor, and the contactor because it looked like it had burned a little, but I still have the same problem.
 
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Old 06-18-14, 04:25 PM
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Turn off the service disconnect or breaker and remove the cover over the compressor terminals to look for burned wires.



If it looks like the top picture it is a lost cause but if it is only a melted wire connection repair kits are available...



Do you own a meter?
 
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