I have a 2003 ford expedition my heater is blowing out cold air then it will blow hot air then go back to cold air could it be from the coolant I changed
I just got my manifold changed it was cracked my coils was bad now my heater not
working right n my engine check light kept coming from the leak in the manifold is Their a
special way the flush the coolant
It sounds like you didn't bleed it or didn't bleed it enough. Try again. You probably have an air lock
how do you bleed it ?
When you fill up your radiator, you have to be sure that the water gets all the way to the top. after is is filled, run the engine and heater for a few minutes to give it time to circulate. Shut off the engine. BE CAREFUL that the radiator cap is not hot, undo it and top it up. Be sure the overflo tank is set to the right height also.
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