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AC Works Intermittantly on Hot Days

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Old 04-29-2011, 02:05 PM
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AC Works Intermittantly on Hot Days

I'll turn on the AC in my 90 Prelude and it will work fine for a few minutes but then when it gets hot outside (above 75) it will all of the sudden stop blowing cold air. I have taken it to the dealership and they say the freon is full charged and it has no leaks. Sometimes if I push the AC button in a few times the cold air will start to work again for a few minutes before quitting again. Any ideas???
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Old 04-30-2011, 12:14 AM
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Re: AC Works Intermittantly on Hot Days

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Old 05-03-2011, 03:00 PM
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Re: AC Works Intermittantly on Hot Days

Maybe a bad pressure switch. If you take a volt meter and test the 12v side going to the compressor until the compressor stops. if you loose voltage you have 1 of a couple things happening. Either freon is low (which you said they verified or the switch is bad. If the compressor stops working and you have 12v then it can be a few things. You could have a bad negative, A/C clutch or a compressor problem.

If you meter the pressure switch on the line side (the side that comes to the switch and not the wire leaving to go to the compressor) and no voltage then you have a wiring issue from the controls/switches.
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