Question about 2002 Pontiac Grand Prix

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Heater comes on and off on my 2002 grand prix

Is there a way to test this before i replace the blower

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  • fan24racer Jan 13, 2009

    can you tell me where the heater motor is located on my 2002 gand prix and how hard is it to get too

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Sounds Like Heat Control Module

Posted on Jan 13, 2009

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Wire the blower motor straight to a dc power source... A battery from a makita or dewalt type of cordless drill will work fine. If the motor spins every time and without failing, then the motor is not the problem. If you notice the motor turning and no air coming out the vents, reverse your wires at the battery.

Posted on Jan 13, 2009

  • Josh Crager
    Josh Crager Jan 13, 2009

    its under the passenger side of the dashboard...the resistor is more than likely your problem. It is held in place by two screws and looks like a trap door. It will have wires going to it.

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You may try replacing the heater resistor block... that controls the different speeds of the motor and may be defective. (they rust). if you look at the duct work near the fan you will see a part with a wires going to it with two or threes that hold it in... remove that and inspect it. be careful. when the fan is going that resister combination gets very hot.

Robert

Posted on Jan 13, 2009

  • Roberta Smith
    Roberta Smith Jan 13, 2009

    passenger side footwell... you might be able to access it from the engine compartment tho that doesn't seem to be likely on the newer cars



    Robert

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