a/c wont kick on!

Old 07-24-11, 09:52 AM
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a/c wont kick on!

Hi, i troubleshot a aqua cooler 4ton ac yesterday, first the indoor unit wouldn't kick on so i figured out it could be a blown fuse which it was, i put a new one and it powered well but the out door unit wouldn't, i did a lot of wiring check up and all was good, when i press the contactor the compressor fires well ,today i installed a new universal control board, but still won't go on, what could possibly be the problem? this ac type has no pressure switches and no defrost board on the outdoor unit, but has an outdoor temperature sensor. thanks.
Old 07-24-11, 10:43 AM
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hi van -

I'm a newbie and can't speak for the guys on the forum here. The guys here are experts and could probably help you anyway, but if you check the list there is another forum here that specializes in a/c

good luck! (what a time to have a/c problems!)
Old 07-24-11, 10:45 AM
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You are actually in the wrong forum and am sure will be moved later but here goes. Do you have 24v at the contactor coil? If so a bad contactor. Is the indoor unit running? Check 24v transformer.

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