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Mac McCormick
Mac ... 10/8/2012
2001 Volkswagen Beetle GLS 4 Cyl 1.8L - Engine
Does this vehicle have an hot water control valve, the heater does not work.
180000, miles
no work done yet
1 Answer
  • HouseCallAuto
    HouseCallAuto 10/8/2012
    Measure the two heater core hoses at normal operating temperature. With full heat commanded and blower motor on High, I would expect to see roughly a 20-30 degree difference between the hoses. An extremely large difference (60 degrees or so) would indicate a completely plugged heater core that is not allowing flow. A small difference (5 degrees or so) would indicate a partially restricted heater core that is only allowing coolant to flow through a small portion.
    The answer to that will get me to the next suggestion. Cannot cover all possibilities in one post, sorry.

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