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Cold air from vents

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by vwgtiking, Jan 24, 2014.

  1. vwgtiking
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    vwgtiking Member

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    [Jan 24, 2014]
    I have climate control and have noticed my air vents are blowing cold air even when the temp is at 90. The only time it's starts to get warm ish is when I am driving in high gears ie 2.5-3k rev range.

    Pls note I have a 1.8t
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  3. vwgtiking
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    vwgtiking Member

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    [Jan 24, 2014]
    Water pump was replaced at 93k and car is on 105k.
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  4. Mike.M
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    Mike.M Well-Known Member

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    [Jan 24, 2014]
    Sound like an air lock in matrix
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  5. vwgtiking
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    vwgtiking Member

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    [Jan 24, 2014]
    Thanks mike. How can I clear an airlock?
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  6. Mike.M
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    Mike.M Well-Known Member

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    [Jan 25, 2014]
    Open bonnet and remove coolant cap......put inside temp to Max heat and fans to Max speed......then getting the car temp up and keep revs to about 2k for a few minutes.

    Monitor coolant as if there is an air lock the level will drop and should not go below the minimum.
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  7. vwgtiking
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    vwgtiking Member

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    [Jan 25, 2014]
    Thanks again mate
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  8. vwgtiking
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    vwgtiking Member

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    [Jan 25, 2014]
    I have done what you have said and I think it's worked. At idle heat is coming out of vents.

    I topped up the water as was quite low. I noticed however a little film on water it expansion tank. Is this normal? It's not dirty at all.
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  9. vwgtiking
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    vwgtiking Member

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    [Jan 25, 2014]
    Dipstick and oil cap no obvious sign of head gasket.
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  10. Mike.M
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    Mike.M Well-Known Member

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    [Jan 25, 2014]
    Good to hear.

    No film should be in the coolant tank? Is is oily?
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  11. vwgtiking
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    vwgtiking Member

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    [Jan 25, 2014]
    It's like a few speckles like the film on a cup of tea
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  12. vwgtiking
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    vwgtiking Member

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    [Jan 25, 2014]
    Come to think of it I believe I used my oil funnel to top up my coolant last time.
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  13. Mike_B
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    Mike_B Active Member

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    [Jan 25, 2014]
    :banghead:
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  14. vwgtiking
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    vwgtiking Member

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  15. Mike.M
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    Mike.M Well-Known Member

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    [Jan 25, 2014]
    That would explain it LOL
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  16. vwgtiking
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    vwgtiking Member

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    [Feb 8, 2014]
    I have just changed my temp sensor and lost a lot of coolant. I topped back up and bled system via the valve under the engine cover until water came. There was a lot of air. Anyway the above method doesn't seem to be working and coolant sploshes out of the top.
    #15

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