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Heater not very hot

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  • Heater not very hot

    Before I start getting stuck in, thought I'd ask if anyone has any tips on why the heater doesn't heat up very well. Maybe the / a valve isn't opening on the matrix properly... Any experience of this shared will be appreciated..

  • #2
    Air in the cooling system. Foam from flaps have blocked the matrix. Or beacause missing foam from temp regulating flap, air is not going through the matrix and goes directly to vents.
    There are no valves on this system, matrix is always at maximum coolant temperature.
    1989 Audi 80 Quattro
    1994 Audi 80 Quattro Competition

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