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AC problem 700

posted by  Ray S on  Sun Jun 9 07:02 CST 2013
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last visit: Thu Oct 23 14:28 CST 2014
[RELATED]

My 1990 740 will not blow cold air. It has no leaks and I've used a vacuum and gauges.I have evacuated the system, replaced accumulator and orifice, but when I charge the low side, it accepts the 134, the compressor runs, but it does not get cold at all. accumulator stays warm to the touch. Anyone?








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    AC problem 700

    posted by  someone claiming to be fixit2002 on  Sun Jun 9 10:54 CST 2013 [RELATED]

    The compressor clutch may be worn out. Try the "bread clip fix".








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      AC problem 700

      posted by  Ray S on  Sun Jun 9 12:02 CST 2013
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      last visit: Thu Oct 23 14:28 CST 2014
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      The compressor runs once it gets enough charge. Would the bread clip fix affect this?








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        AC problem 700

        posted by  someone claiming to be fixit2002 on  Mon Jun 10 07:55 CST 2013 [RELATED]

        By "runs" I'm assuming you mean the clutch engages and spins but if it is worn out it won't be making contact inside to spin the compressor. The bread clip shims will push it in further and may solve the problem. I've had them on my 850 for over two years.








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          AC problem 700

          posted by  Ray S on  Mon Jun 10 08:11 CST 2013
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          last visit: Thu Oct 23 14:28 CST 2014
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          I understand what you're saying and thanks. The compressor in the 740 differs from the 850. Here is the 740 http://www.fcpeuro.com/products/volvo-a-slash-c-compressor-r134-240-740-760-780-940-air-prodcuts

          Would I be able to slip shims under the 3 round black objects?








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    AC problem 700

    posted by  matt82dl on  Sun Jun 9 10:52 CST 2013
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    last visit: Mon Oct 13 10:46 CST 2014
    [RELATED]

    could be a bad solder joint in the dash unit. This is well documented in the FAQ. what happens if you temporarily jumper the AC pressure switch closed?

    check to see if you have 12v at the pressure switch.



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