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

Cooler air at idle

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by vwgtiking, Nov 21, 2013.

  1. vwgtiking
    Offline

    vwgtiking Member

    Joined:
    Oct 4, 2010
    Messages:
    806
    Likes Received:
    7
    [Nov 21, 2013]
    When I have the heaters on hi and engine warmed to 90 they blow really hot air which is fine, but soon as I stop in traffic or at lights the heater blows cool air or barely warm. What's causing this?
    #1
  2. stu_m
    Offline

    stu_m Well-Known Member VCDS Map User

    Joined:
    Oct 25, 2009
    Messages:
    1,442
    Likes Received:
    37
    [Nov 21, 2013]
    its probably the cold winter air causing it!!

    I'm guessing its a TDI? they run cooler and cool down quicker
    #2
  3. S4_dan
    Offline

    S4_dan Fire up the Quattro! VCDS Map User

    Joined:
    Jan 5, 2006
    Messages:
    2,211
    Likes Received:
    127
    [Nov 21, 2013]
    Weak thermostat, air in the system, weak water pump, or just generally cold outside.....

    Try placing a piece of cardboard in front of the radiator and see if that makes any difference.....BUT KEEP AN EYE ON YOUR TEMP GAUGE IF YOU DO THIS.
    #3
  4. vwgtiking
    Offline

    vwgtiking Member

    Joined:
    Oct 4, 2010
    Messages:
    806
    Likes Received:
    7
    [Nov 21, 2013]
    It's a 1.8t. Why would cold affect it? Engine hot then hot air? Never had issue with mk4 golf 1.8t.

    How easy is it to change thermostat on these b6s?
    #4
  5. vwgtiking
    Offline

    vwgtiking Member

    Joined:
    Oct 4, 2010
    Messages:
    806
    Likes Received:
    7
    [Nov 21, 2013]
    Water pump done recently.
    #5

Share This Page