1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Audi A6 - Pressure good but no cold air

Discussion in 'Air Conditioning' started by BlackQuat, Aug 28, 2012.

  1. BlackQuat
    Offline

    BlackQuat Well-Known Member VCDS Map User

    Joined:
    Nov 24, 2009
    Messages:
    1,800
    Likes Received:
    44
    [Aug 28, 2012]
    Hi.
    We have a Audi A6 2002 1.9 TDI 130.
    When we got the car the ECON light was permantly on. I ran vcds and found a fault with the G65 sensor. Actually it'd been fully removed and the connection damaged. So I repaired the connection, fitted a brand new G65 sensor and had the system recharged.

    It then turned out that the clutch ( I say clutch but it doesn't have one as it has a N280 valve) was missing. So I got a new plate for it so it actually did drive the compressor.

    With VCDS I see a pressure increase with ECON being turned off and when I turn it on the pressure decreases. But I do not think the pressure goes up enough when the aircon is activated. My A4 goes to 9-12 bar when using aircon. Where the A6 barely hits 5 or 6.

    I have run the car for 3 minutes with aircon on, both sides on LO.
    I get:
    A/C Valve (N280) Current: 0.650amp
    A/C Valve (N280) Duty Cycle: 64.5%
    High Pressure Signal (G65): 19%
    Refridgerant Circuit Pressure (G65): 4.6Bar

    It seems low, but the actual pressure is fine.
    Could this be the N280 valve not opening enough to let the pressure build?
    #1
  2. Ads

    Ads

    [Sep 15, 2014]

  3. BlackQuat
    Offline

    BlackQuat Well-Known Member VCDS Map User

    Joined:
    Nov 24, 2009
    Messages:
    1,800
    Likes Received:
    44
    [Nov 15, 2012]
    Well after the huge amount of suggestions.
    I did something I didn't want to, i bought a top up can. Charged it up and it's working perfectly.
    #2

Share This Page