A/C box fan outside wont turn on anymore, hums..... can't figure out


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Old 06-26-10, 10:39 PM
J
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A/C box fan outside wont turn on anymore, hums..... can't figure out

Hi All,

One of the 1.2 million unemployed whose unemployment was also ended by the Senate yesterday.
Well, apparently that wasn't enough for the week. This evening, the A/C decided to break, and it hovers 95+ here afternoons and very very humid.

The central fan works just fine, but the fan box outside won't kick on anymore. It appears to be humming (reminds me of a vaccuum with something stuck in the rollers) but the fan blade turns freely and I can't see anything stuck.

Is this a common problem/common occurrence that anyone has heard of before? Obviously it must be getting power or it wouldn't be humming. Open to any suggestions and will try anything, thanks much.
 
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Old 06-27-10, 07:46 AM
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Do you hear the louder hum of a compressor running, indicating that 240VAC and 24VAC is present to the condenser, or only the hum of a contactor, indicating 24VAC is present?

Do you have a meter?

 
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Old 06-27-10, 08:03 AM
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If the compressor runs but the outside fan hums but won't start, then I would try replacing the fan capacitor.
 
 

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