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Disco 2 Air con compressor fault

Discussion in 'Land Rover Discovery' started by Inkjets1, May 15, 2019 at 9:29 PM.

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  1. Inkjets1

    Inkjets1 Member

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    Hi all,

    Looking for a bit of advice please.

    My Disco 2 TD5 (1998) has basic air con that just works on the heater switches, not a control temp panel.

    It’s never worked since I had the car.

    Today I had it pressure checked and re-gassed which all wentwell. But when we started it up and put the blowers on, there was no air con and the compressor didn't kick in at all (even although the belts turn it fine).

    The garage said it was an electrical fault most likely as they said the compressors on D2's rarely go wrong.

    I checked the fuses in the fuse box, and under the drivers footwell and they were all ok.

    Is there anything else I can try before spending out for an electrical diagnostic next week, a fuse I may have missed ect, only to find it was something simple (as I am a fairly new D2 owner).

    Any advice would be sincerely appreciated,

    kind regards,

    Greg
     
  2. sierrafery

    sierrafery Well-Known Member

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    Hi, the problem is that it seems that the aircon on your's is retrofitted cos there is no such thing from factory to have aircon with non-aircon controls which are for heating and ventilation only, those with aircon from factory mut have the electronic control so you should find a retrofitted switch which sould activate the compresor clutch
     
  3. Inkjets1

    Inkjets1 Member

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    Hi serrafrey,
    Thanks for your reply..
    I probaĺly didn't make it very clear.
    There are buttons for air con and air recycle on the heater panel. They both work and they light up with a orange light when selected.
    They are both normal landrover switches / buttons.
    Hope that may give you any other ideas.
    I'm beginning to think I will probaĺly end up with a electrical diagnostic test done but I bet it's something stupid like a loose wire or relay somewhere.
    Many thanks tho,
    Geeg
     
  4. sierrafery

    sierrafery Well-Known Member

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    Unfortunately that kind of system is not described in any official document nor diagrams available so presuming it has the same circuit like those with digital control remove relay R11 and make a bridge in the fusebox with a wire where terminals 30 - 87 of the relay were(they are noted on the relay) ... then the compressor clutch should engage if that circuit is good .... according to the result we'll speak again
     
  5. Inkjets1

    Inkjets1 Member

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    Fab, Thank you. That will give me a start to look at Friday. I'll let you know how it goes.
    Many thanks again,
    Greg
     
  6. discool

    discool Well-Known Member

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    Being a 1999MY disco u have the same AC system controls as the D1, therefore press the master switch on, it should illuminate, select the heater fan speed and turn both of the temperature controls to your desired temp. For maximum cooling press the air recycling button, you only want to cool the air inside the vehicle, and turn the temp controls to blue.

    If the AC still doesn’t work then check when switched on for 12v at the compressor, it’s not unknown for the compressor clutch to be faulty.
     
  7. Inkjets1

    Inkjets1 Member

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    Thanks Driscoll,
    Year, that sounds the same system as mine.
    If the clutch is faulty, can they be freed up or is it usually a replacement or second hand compressor needed. Cheers, greg
     
  8. sierrafery

    sierrafery Well-Known Member

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    in which document is described that D2 system then? ... my cousin has first generation XA... ('99) D2 and the aircon is as described in RAVE with electronic control, all the erly modells which i've seen with the same comntrols like the D1 were without aircon ... that D1 setup as you say(which i dont doubt it can be real) is not described in any D2 workshop manual, nor diagrams available cos the D1 diagrams are certainly not valid for the D2's setup and even though the controls are the same the circuit must be different :confused:
     
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