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Heater matrix
I have a Volkswagen Passat 1.9 TDI 1999 with a heater matrix problem I think (no heat. The car had a leak on the main cooling radiator so a mechanic put some sealant in last year. The car has had a new thermostat/water pump and been flushed. The heat control knob is working as I can feel the valve arm moving but I have not checked the heater valve to see if it is sezied. The pipes to the bulk head are both warm/hot but I am trying to avoid pulling the dash out.
Asked on 2 January 2011 by Mr Whippy
Answered by
Honest John
The sealant has probably blocked the valve to the heater matrix.
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