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    maizelle's Avatar
    maizelle Posts: 3, Reputation: 1
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    #1

    Nov 8, 2011, 10:22 AM
    Why is my car heater blowing cool air after flushing it out
    What should I do to fix car heater after flushing it out
    maizelle's Avatar
    maizelle Posts: 3, Reputation: 1
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    #2

    Nov 8, 2011, 10:33 AM
    Does a 2000 saturn have a blend door acuator
    Does a 2000 saturn have a blend door acuator
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #3

    Nov 8, 2011, 10:43 AM
    . Did you reverse flush the heater core by itself?

    . Are the heater's inlet and outlet hoses hot, when the engine is at normal operating temperature? If not, phosphate scale (minerals from water) may have built up inside the core. Frequently, people have to allow the core to soak in a solution of CLR and then thoroughly flush it out. Another possibility is that the heater control valve is bad.
    jershu3's Avatar
    jershu3 Posts: 21, Reputation: 1
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    #4

    Nov 28, 2011, 08:51 PM
    Often when flushing a cooling system, the crud that comes out of the radiator and motor get stuck in the heater core. If one hose is hot, and not the other, that is probably the case. Remove the hoses, and put something like your garden hose on the side that was cooler, and try to back flush the heater core. Be careful not to get burned, and make sure to disconnect both hoses so that the crud doesn't blow back into the motor. Also low coolant, and an air pocket in the motor can cause this problem.
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