Question about 1992 Buick Roadmaster

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1992 Buick Roadmaster Limited- air conditioner blows hot air, does not need feon and compressor appears opperational. Any ideas

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  • yadayada
    yadayada Jun 04, 2010

    what are the system pressures? low and higfh side

  • wheatfarms Jun 04, 2010

    The feon level on my gauge was high. It would not take any feon.

  • yadayada
    yadayada Jun 04, 2010

    that doesn't answer my question, what were the pressure readings low and high side lines?

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  • Buick Master
  • 6,826 Answers

Make sure the large line going in the firewall is cold,if so,the problem is on the inside ,check the temp door,it is most likely not opening for cold temp.

Posted on Jun 04, 2010

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jun 05, 2010

    The low,and high side pressures are important,but sense you do not have a set of ac gauges handy,look for a cold line going to the firewall,and the dryer,they should be cold,if they are not,you will need to have a set of gauges to tell what is going on inside the ac system,but if the dryer,and the large ac line going in the firewall are cold,then the temp door is not opening up,so check for a vacuum problem under the hood,or a vacuum switch behind the ac control,

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