A/C Compressor Clutch | Ford Escort Owners Association (FEOA)
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A/C Compressor Clutch

Discussion in 'HVAC' started by Robertjstevensjr, Jun 21, 2018.

  1. Robertjstevensjr

    Robertjstevensjr New Member

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    I have a 2001 Escort ZX2. The a/c clutch engages when the switch is in the off position and the clutch stops when the switch is turned into the on position. Any one have a clue where I could start?
  2. rbailin

    rbailin FEOA Member

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    What "switch" are you talking about? The ZX2 has the same HVAC controls as the sedan, right?

    Do you have the factory radio setup or is there an aftermarket radio/HVAC controls in place?

    Is this a recent problem or have you always had it since owning the car?
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  3. Robertjstevensjr

    Robertjstevensjr New Member

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    It has the factory radio and I am talking about the controls in the dash. Have only owned it for a few months so not sure how long it has been like this.
  4. denisond3

    denisond3 Moderator Staff Member

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    I dont even have a guess. Sorry.
  5. marclar

    marclar Moderator Staff Member

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    sooo.. when you want ac, its off.... and when its off, its on? iirc the compressor is controlled by the ccrm.. sounds like you may have a failing module
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  6. marclar

    marclar Moderator Staff Member

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    not sure if this is exaactly the build for this year, but looks like the ccrm controls the compressor. these are known for failing.

    Attached Files:

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  7. zzyzzx

    zzyzzx FEOA Member

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    I have an older Escort that doesn't have this module, but it's my understanding that the modules are repairable in that it's a relay, or something inside it.

    In your case, I would be checking the switch first.
  8. rbailin

    rbailin FEOA Member

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    If you had a bad CCRM, chances are the A/C would never work.

    Unless someone has removed the factory radio/HVAC in the past and screwed up the wiring, the problem you're describing is unlikely. Since you're new to the car, here's what should happen with the A/C in the various switch positions, using analog clock descriptions:

    12 o'clock position: (Off) All off, no fan, no airflow, no a/c
    11 o'clock position: (Vent) Fan on, airflow from vents, no a/c
    10 o'clock: (A/C) Fan on, airflow from vents, a/c on
    9 o'clock: (Max A/C) Fan on, recirculated airflow from vents (no outside air), a/c on
    1 o'clock: (Bi-level) Fan on, airflow from vents and from feet, a/c on
    2 o'clock: (Heat) Fan on, airflow from feet, a/c off
    3 o'clock: (Heat/Defrost) Fan on, airflow from feet and from defroster, a/c on
    4 o'clock: (Defrost) Fan on, airflow from defroster, a/c on

    As you can see, the a/c is on in many positions you wouldn't normally expect. But it should never be on in the Off position.

    Whenever the a/c is on, the a/c clutch plate with 3 bumps will engage and visibly spin every 5-20 seconds, cycling on and off, depending on the outside temp and whether the system is fully charged. If the a/c clutch spins slowly or erratically in the off position, then the clutch is damaged. If the a/c clutch spins normally in the off position, unplug the 2-wire connector leading to the compressor and it should stop spinning completely. If it still spins, then the clutch is seized. If it doesn't spin, then you're going to have to do some investigation with a voltmeter to determine when there's voltage present at that connector.

    It's possible that at some point in the past, the previous owner replaced the CCRM with the wrong model, but that usually results in other major problems like the engine not running at all.

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