Question about 1999 Volkswagen Passat

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Heater problems in my vw passat

The heater in my vw passat doesnt work fan blows but no heat hardly comes out

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On an old passat it's likely that the covering over the heater control flaps has deteriorated which exposes large holes in the flaps themselves that the air blows through instead of being directed around the heater radiator. If you've ever noticed bits of black foam padding in your heater vents this almost certainly the case.
It's not an easy job to fix, I had to remove my entire dashboard so I could get the heater box out. The flaps are inside the box. After a good clean with some spirit I covered them with a couple of wraps of gaffer tape which has proved adequate and I now have a lovely warm car and nice clear windows in all weather's.
It would be expensive at a garage I expect, it took me a couple of days and if I ever wanted to do it again I think I could do it in one full day.

Posted on Feb 13, 2016

  • king noel Feb 13, 2016

    On an old passat it's likely that the covering over the heater control flaps has deteriorated which exposes large holes in the flaps themselves that the air blows through instead of being directed around the heater radiator. If you've ever noticed bits of black foam padding in your heater vents this almost certainly the case.
    It's not an easy job to fix, I had to remove my entire dashboard so I could get the heater box out. The flaps are inside the box. After a good clean with some spirit I covered them with a couple of wraps of gaffer tape which has proved adequate and I now have a lovely warm car and nice clear windows in all weathers.
    It would be expensive at a garage I expect, it took me a couple of days and if I ever wanted to do it again I think I could do it in one full day.

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Try removing he heater hoses going into the firewall(when cooled)and blow the heater core out with compressed air.Or you could have the cooling system flushed.

Posted on Jan 14, 2009

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