So my fan wasn't working at all, so I replaced the heater blower motor. Now my heater will only blow out hot air above 60mph. It will blow out hot air for about 30 seconds at lower speeds, then it will blow cold air. I have no idea what the problem could be.
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That would make me wonder if there was some obstruction to coolant flow through the core. At higher engine speed the greater flow rate/pressure could overcome the obstruction.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL -
Did you remove any heater hoses? If so you need to make sure they are on correctly or it will not flow properly.Comment
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Back flush your heater core...Comment
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