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Why doesn't my ac work on 97 pontiac sunfire? (It's full 134a)

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  • steven_hamil Jun 29, 2009

    I checked & the compressor is coming on & the a/c high line is getting cool but not cold, the car is a 96 sunfire.

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Check to see if the compressor is coming on. Turn of the engine and inspect the wire going to the compressor clutch. make sure it is not unplugged. Check all the wires to the pressure switches, make sure they have good contact. Note: never put 12V to the compresso clutch unless you have good knowledge of electronic, and electrical system. You can really damage some electronic circuits inside. If there is no 12volts going to the compressor clutch, check for blown or missing fuse. See if a relay clicks. When you turn on the ac.

Posted on Jun 29, 2009

  • Ronado Panaligan
    Ronado Panaligan Jun 29, 2009

    You meant the low side is not getting cool. The high side is suppose to get hot. Check the low side pressure. It should start at around 45 psi, and gradually go down. If its too high like 60psi it might be overcharged or there maybe a clog.

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