AC not working at all big mystery


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Old 07-09-11, 11:32 AM
L
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AC not working at all big mystery

I have a Lennox HS26-511-1P. Yesterday it quit working. The outside unit and the air handler on the inside do not turn on. I only hear the low hum of the current going to the units. I checked the breakers and changed the batteries on the thermostat. I was wondering could it be the capacitor on the outside unit causing this. Or is there a one on the inside unit that could cause this, or is there some type of relay that may be to blame. Please help.
 
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Old 07-09-11, 04:48 PM
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that humming noise may be your transformer. check and make sure that is properly working then go through your schematic to examine your sequence of operation.
 
 

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