Erratic operation of the heater may be caused by a leaking head gasket. Our technicians recommend a complete inspection of the cooling system and engine should be performed if this condition is present.
Average mileage: 144,000 (144,000–144,000)
6 people reported this problem
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Car only heats to 140 degrees or so unless sitting and idling. Heat is luke warm unless sitting and idling (increases with gauge appropriately). Radiator replaced, thermostat replaced with a 195 degree unit, new water pump as well. Heat diverter valve replaced, coolant system flushed. The good is the car will never overheat. the bad is I am freezing my butt off in the winter.