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Thread: A/C Compressor not working

  1. #1
    Junior Member Jesse's Avatar
    Join Date
    Apr 2018

    A/C Compressor not working

    When I start the engine and switch on A/C the magnet clutch kicks in for one second and then stops working.

    There is enough pressure in the system, the pressure switch is working o.k.

    If i bridge the switch it is the same. Magnet clutch kicks in, then stops.

    So I think the rev sensor of the compressor is not working.

    How can i check the sensor?

    Is there a wiring diagramm of the system available (climatronic) ?

    Last edited by Jesse; 08-22-2018 at 01:33 PM.

  2. #2
    E500E Guru
    Join Date
    Feb 2011
    DFW Texas

    Re: A/C Compressor not working


    first and absolute first thing to check. Do you have any PS leaks which would leak down onto the compressor clutch? The FSM appears to be online and you can find all your information needed. The sensor is a hall effect sensor- check it the with the same way as a CPS. Noteably, there is probably something on testing in the FSM.


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