Heater o 2002 dodge grand caravan works great when car is not moving but at highway speed the tempture gage goes down to cold/

Asked by Robert Feb 10, 2014 at 09:51 AM about the 2002 Dodge Grand Caravan Sport FWD

Question type: Maintenance & Repair

Heater o 2002 dodge grand caravan works great when car is not moving but at highway speed the tempture gage goes down to cold/

2 Answers
255

Dman answered 9 years ago

Yes, thermostat, and all the heat/cold flaps run on vacuum. (check vac lines under hood ect...) Diff vac press at idle.

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