02 Forester AC problem - cutting on and off constantly

Discussion in 'Subaru Forester' started by mparkes, Jul 7, 2007.

  1. mparkes

    mparkes Guest

    02 Forester 2.5L, 120,000 miles.
    Lately the AC has been really acting up, it usually works okay when
    first turned on at engine idle but as I accelerate the AC is apprently
    cutting in and out sporadically to the point where the car runs very
    rough, jerking. But if I turn off the AC it runs smooth. It will
    sometimes blow hot air for a bit, and then cut back on and cool
    normally. Once I get the car up to highway speeds it seems to settle
    down and cools normally. Thanks for any help!
    mparkes, Jul 7, 2007
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  2. mparkes

    nobody > Guest

    Sounds like a compressor locking up. The next time it does this, stop
    and open the hood and see how hot the A/C belt is, or if there are
    "divots" or burnt spots on it.
    nobody >, Jul 7, 2007
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  3. mparkes

    Todd H. Guest

    Get the AC serviced before the compressor seizes. The compressor may
    be low on oil or refrigerant.
    Todd H., Jul 7, 2007
  4. mparkes

    mparkes Guest

    OK thanks.

    It seems to be only happening on very hot days - I drove it into town
    today and it did fine, never noticed any problems and cooled normally,
    with the outside temps are low-mid 80's. It seemed to be acting up
    this past week when the temps were in the upper 90's. Could the
    outside air temp trigger the problem? Is the oil for the compressor
    something I can check?
    mparkes, Jul 7, 2007
  5. Maybe the drive belt is old and 'glazed'. Either have it inspected or -
    as a possible trouble shooting aid, buy some 'belt ease' and spray on
    it. If the problem goes away - likely the belt is stretched/old
    whatever. If its the original - probably bad. Depending on mileage,
    could be bad if its the second one on the car.

    this does not mean the compressor could'nt be trying to seize though!

    Carl 1 Lucky Texan, Jul 8, 2007
  6. mparkes

    AS Guest

    Are the fans running?

    If it happens only when accelerating with the car stopped, and on hot
    days, the high pressure swithc could be cycling on and off, and being
    high pressure the engine could feel as you described.

    It could be the compressor seizing up too.

    When was the AC serviced last? Has anyone added refrigerant
    overcharging the system?
    AS, Jul 9, 2007
  7. mparkes

    Spudzzz Guest

    I don't know that the AC has ever been serviced. I just take it to a
    local Goodyear shop and they perform whatever servcice is recommeneded
    at specific intervals. Don;t know that I recall AC ever being
    mentioned though. And no refigerant ever added as far as I know.
    Spudzzz, Jul 11, 2007
  8. mparkes

    Sjnasca Guest

    I have the same problem with my 2002 Outback. Have you ever figured
    out what the problem is?
    Sjnasca, Jul 29, 2007
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