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
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.