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P38A AC Issues

Discussion in 'Range Rover' started by Stevekennah, May 4, 2019.

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  1. pwood999

    pwood999 Well-Known Member

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    Just do the relay bypass. That panel needs full compressor current or it faults.
     
  2. Stevekennah

    Stevekennah Active Member

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    Which panel pwood? The awr1012?
     
  3. pwood999

    pwood999 Well-Known Member

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    It’s an early version and is expecting to see compressor clutch current. Later models ignore the current and trigger the relay.

    It depends if the relay wiring has a load resistance to fool the control circuit.

    If your VIN is later then someone swapped the correct panel probably due to LCD issues.

    Mine has no relay but later panel. All the info is in that other thread.
     
  4. wammers

    wammers STILL BREATHING. Donater

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    JFC102550 covers all models with heated seats as does JFC102540 without heated seats, but that is no longer available. They will run the aircon with or without relay 3. There at one time was a wiring kit to incorporate relay 3 but no longer available and for what it was cost a bloody fortune. But anyone with a bit of nous should be able to look at 1999 and on wiring diagrams and rig relay 3 in. Wire from Hevac to relay 3 pull side and ground. 20 amp feed to relay 3 power side and to compressor, simples.
     
    Last edited: May 15, 2019
  5. Grrrrrr

    Grrrrrr Jedwood Spannerhands

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    Simple when you know how!
     
  6. wammers

    wammers STILL BREATHING. Donater

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    Fortunately i know how. But no need, on mine it does not have relay 3 but it does have JFC102550 that runs the aircon without problems. Because it is designed to replace ALL previous models. I also have a replacement one to fit if anything goes wrong. But i don't think it will, the one fitted has been running aircon for over ten years without a problem.
     
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  7. Stevekennah

    Stevekennah Active Member

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    So quick update using the main dealer method of fault finding the following has been replaced

    Dryer
    Pressure switch
    Tri switch
    Interior sensor
    Evaporator sensor

    Just waiting for the JFC102550 HEVAC panel and then a quick prey to the range rover god's before gassing and firing it up........
     
  8. Stevekennah

    Stevekennah Active Member

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    Hi all

    Just a quick message to say thanks to everyone who offered help and assistance with this issue, I now have a working ac system

    Next problem .... Cruise control
     
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  9. Grrrrrr

    Grrrrrr Jedwood Spannerhands

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    It was the wrong panel?
     
  10. Stevekennah

    Stevekennah Active Member

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    That was one of the issues

    Thanks again for the help
     
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