![]() Check to see what type it is it can be a vacuum controled vavle, or a cable hooked on to the valve or an electronic controled valve. if this does not work, check the heater control valve.move the temperature slider the one to control the temp inside the car. you are trying to remove any clogs the heater may have. Then do it on the outlet and run it until the coolant is clear. put it into one of the the inlet of the heater core and run water until you see clear coolant. disconnect the hoses and use a water hose running at only a moderate flow. On the fire wall you will see 2 hoses an inlet and an outlet.that go directly into the heater core. Pass a vacuum over the control panel to prevent dust build up behind the console. Move the fan switch back and forth to re-new the electrical conductors. If it's a vacuum type heater control valve then cash for leaky vac. Back and forth.Ĭlean and lube the linkage with WD-40 to free the heater control valve. Open the hood and move the heater to max and min. The heater control valve (near the firewall) may be stick over time. Let the engine ran for 20 minutes wih the cap off and the trap air will escape from the coolant reserve tank,Ĭheck coolant level and top off coolant when the engine cools down.Ī shop will charge $75+ for this but using an air operated excavate tool!Ī car with over 90K miles may experience linkage problem to the heater control valve. Iet the engine cool off and top off the coolant tank. ![]() The DIY method is to drive you car onto a ramp or a steep hill. ![]() If you did a coolant flush recently then air pocket can be the cause of the un-even heating problem. When the engine is cold,check the coolant level.Ī coolant system should be flush every two years.
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