Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 38

Thread: Air con not cold.

  1. #11
    Member
    Join Date
    May 2011
    Posts
    32
    Post Thanks / Like

    Re: Air con not cold.

    Dunno - but that was 2 years ago and I laid the car up last winter for about 4 months so the air-con needs a re-gas.(It's not cold!) I'll make him aware of those pipes - thanks for the tip!

  2. #12
    Senior Member
    Join Date
    Jan 2011
    Location
    Market Bosworth Marina. CV13.
    Posts
    1,001
    Post Thanks / Like

    Re: Air con not cold.

    Hi again Guys,

    Just been under the bonnet with a torch and when the aircon is switched on the compressor (bottom right of engine at front) clutch is not engaging etc.

    Fuses are ok, any ideas guys ?, thanks.

    Supertrev.

    .
    Truly immaculate 2004 XJ 350 - V8 in Jaguar Racing Green which sparkles in the strong sunshine.

  3. #13
    Senior Member
    Join Date
    Feb 2012
    Location
    Doncaster. South Yorkshire.
    Posts
    372
    Post Thanks / Like

    Re: Air con not cold.

    If there is no gas in the system, the compressor does not cut in. Have you checked the gas level yet?

  4. #14
    Senior Member
    Join Date
    Jan 2011
    Location
    Market Bosworth Marina. CV13.
    Posts
    1,001
    Post Thanks / Like

    Re: Air con not cold.

    .

    Hi Jagfix and thanks.

    Looks like I'll have to go to my local indie then and pay more money out.

    Slight problem is that he closes at 4pm (can you believe that ?) and I cant get there till 4.15.
    His workshop and office is an absolute rubbish tip which maybe wouldn't inspire confidence with a new customer making enquiries for example.

    Supertrev.

    .
    Truly immaculate 2004 XJ 350 - V8 in Jaguar Racing Green which sparkles in the strong sunshine.

  5. #15
    Super Moderator Ian D's Avatar
    Join Date
    Nov 2008
    Location
    Hampshire
    Posts
    7,913
    Post Thanks / Like

    Re: Air con not cold.

    Why not find a mobile air con specialist, they will be more clued up than just keep trying to gas the system and wonder why its leaking, they can do a full check of the system and let you know what parts have gone, some even carry common parts such as compressor, o rings etc.
    Current Car:
    2017 XE R-Sport 25t 250Ps 18MY.

    Previous Cars:
    2000 S-Type 3.0L SE Auto
    2004 X-Type 3.0L AWD SE Auto estate.
    2007 XK x150 4.2L Coupe

    Resident Super Moderator.
    V6 X-Type Oil Sump Replacement Guide


  6. #16
    Junior Member
    Join Date
    Aug 2018
    Location
    UK Faversham Kent
    Posts
    6
    Post Thanks / Like
    My problem is that with a re gassed system and working compressor, a new pressure valve, a new heater valve and a replaced air con module, the air compressor clutch relay doesn't pull in. Also the PWM cooling fan doesn't operate immediately - it seems to wait until the engine temp rises to normal. So no cold air on hot days even though everything else works fine. Can a faulty thermistorc stop the clutch relay from pulling in? My S type is a 54 3Lt model and is a BRG beauty. The next test I'm thinking of is to short the relay out so the clutch pulls in, and using a table fan in front of the radiator to see if I can get some cold air at least momentarily without risking over pressurizing the system. Any thought anyone? Sorting the air con on my Rover 75 was easy by comparison with this!

  7. #17
    Senior Member Lost it's Avatar
    Join Date
    Jun 2012
    Location
    Hayling Island
    Posts
    8,166
    Post Thanks / Like
    To be fair, even with a new condensor rad, drier and a full charge, my X type can still blow the S type into the weeds when cooling... Although it might be because the interior of the S is more capacious.
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, all the toys.
    2004 3.0 Sovereign Estate. Winter pack. Fixed. For Sale.
    2005 Estate X type 2.2 Sport.
    2000 V8 3.2 XJ8 LWB. "Prom" car. Lovely. Should sell this one too really...
    2005 "AllyCat", 3.0 XJ6 SE.
    2000 S type 4.0 V8. Latest toy.
    VFR800A and a VFR 800F

    Still beating cancer. Trevor 2, Cancer 0.

    Sure I took the Red pill....

  8. Likes orsom weels liked this post
  9. #18
    Senior Member
    Join Date
    Jul 2009
    Location
    Yorkshire
    Posts
    10,310
    Post Thanks / Like
    Might even be sensor reporting a false temperature (or icing) so it decides not to cool any more.

  10. #19
    Senior Member
    Join Date
    Nov 2014
    Location
    Norfolk, UK
    Posts
    484
    Post Thanks / Like
    Quote Originally Posted by Lost it View Post
    To be fair, even with a new condensor rad, drier and a full charge, my X type can still blow the S type into the weeds when cooling... Although it might be because the interior of the S is more capacious.
    Yes, same here, one of the few things that is better on the X type. I wonder if some of the difference is down to the cooling fan behaviour? On the X type, when air con is on the rad fan runs more or less flat out, it's quite obvious that it is working regardless of engine temp, whereas on the S types (all 3 I've had/got) you can hardly detect the fan running unless engine temp is high, & even then it doesn't seem as powerful as that on the X type (2.2D). The X type will deliver ice cold air standing still with the engine at idle, the S types however, only really deliver that amount of cooling when travelling at speeds of over 25-30mph, suggesting to me they need more airflow through the condenser &/or the compressor needs to run faster. When stationary, they do cool below ambient temps, but certainly not 'ice cold'.
    All that said, if the OP's compressor clutch is not pulling in, it won't cool no matter what speed/RPM's the car/fan is doing. My first thought would have been pressure sensor, but it sounds like that may have been replaced, is this what you are referring to by "a new pressure valve"? so second thought, given what has already been done, would probably be a wiring fault to the compressor clutch. The wiring does tend to get quite brittle in that area & can break or become high resistance. If shorting the relay brings the clutch in, that will prove the wiring is OK, if not, kit may be something worth looking into a bit deeper.

    Regards, OW
    1999 S Type 3.0L SE, A truly lovely old girl that's served me well. Probably the best car I've had. Now retired.
    02.5MY (X202) S Type 2.5L SE, 58,000 miles, full Jag s/h, all papers, MOT's, receipts etc from new when purchased.
    2006 X type SE 2.2 Diesel. Supposed to be Mrs O's economical commuter car.
    2004 (X202) 2.5L Sport plus, to replace the 3.0L

  11. #20
    Senior Member
    Join Date
    Jul 2009
    Location
    Yorkshire
    Posts
    10,310
    Post Thanks / Like
    Mine does not behave as just described. Fans run fast, air is ice cold.

    Difference due to it being X202 / STR?

Page 2 of 4 FirstFirst 1234 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •