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Thread: Slow a/c on D4

  1. #1
    Join Date
    Mar 2012
    Location
    Cooroy
    Posts
    22

    Smile Slow a/c on D4

    Hi Guys
    Any ideas why my air con takes a while to kick in.When it does itís cool enough.
    Thanks

  2. #2
    Join Date
    Oct 2016
    Location
    Perth, AU
    Posts
    447
    Is it 43 degrees outside?
    2010 TDV6 3.0L Discovery 4 SE, Alaska White, GME XRS-330c, IIDTool BT, GOE Compressor Plate, Traxide D3-DU Dual Battery Kit, Rhino Rack Batwing Awning (Part time install), Hankook Dynapro AT-m RF10

  3. #3
    Join Date
    Jun 2013
    Location
    NSW Australia
    Posts
    646
    Quote Originally Posted by Hamersley View Post
    Hi Guys
    Any ideas why my air con takes a while to kick in.When it does itís cool enough.
    Thanks
    The compressor has a control valve that fails in it. Mine is now at the point that sometimes it'll stop cooling at random. I'm going to replace the whole compressor. Since have had just the valve done with success. Done have not. Mine is 10 years old. So it's at the time anyway
    If at first you do not succeed, maybe your just no good and should quit!

  4. #4
    Join Date
    Jan 1970
    Location
    Melbourne, AU
    Posts
    566
    What year is yours?
    Had the problem with my 2013 - service topped up gas but didnít really fix it.
    Had the option to get compressor replaced under extended warranty so had that done.
    _________________________
    Discovery 2 2002 Td5 ES Auto - SLS lift, chipped, CDL, de-EGR, Traxide USI160 DBS
    Discovery 4 2013 SDV6 HSE Auto - Llams, Traxide SC80LR DBS
    Nanocom Evolution with codes for both above vehicles.

  5. #5
    Join Date
    Mar 2012
    Location
    Cooroy
    Posts
    22
    Mine is 2010,just out of warrenty!
    I think josh,s take on it is right,Iím up for a new compressor

  6. #6
    Join Date
    Mar 2016
    Location
    Perth
    Posts
    2,586
    Quote Originally Posted by Hamersley View Post
    Mine is 2010,just out of warrenty!
    I think josh,s take on it is right,Iím up for a new compressor
    Same. Mineís had the valve replaced and still faulting. Sigh.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  7. #7
    Join Date
    Jun 2013
    Location
    NSW Australia
    Posts
    646
    Quote Originally Posted by DiscoJeffster View Post
    Same. Mineís had the valve replaced and still faulting. Sigh.
    I can't find a filter or drier on my car at all. Even though I have one for a discovery 4 in the shed. My take is the components that are controlled by the valve. Swash plate etc are sticking due to age and contamination.

    Same symptoms as the early failures. But we are both getting on in age
    If at first you do not succeed, maybe your just no good and should quit!

  8. #8
    Join Date
    Oct 2012
    Location
    Perth
    Posts
    1,478
    Where does this mysterious AC valve that fails live in the system and is it easily available from AF or similar? Do you need to evacuate system to change it?

  9. #9
    Join Date
    Mar 2016
    Location
    Perth
    Posts
    2,586

    Slow a/c on D4

    Quote Originally Posted by PerthDisco View Post
    Where does this mysterious AC valve that fails live in the system and is it easily available from AF or similar? Do you need to evacuate system to change it?
    Itís in the side of the compressor. You have to get them from AC suppliers. Yes you have to discharge and recharge, and it only helps occasionally.

    Edit: itís the compressorís variable displacement control valve, as the compressor is designed to vary its capacity and cooling rather than turn on and off like in the old days.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  10. #10
    Join Date
    Sep 2014
    Location
    Baldivis WA
    Posts
    1,059
    Watching this with interest...

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