Question about 1997 GMC Jimmy

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Heater won't blow air - 1997 GMC Jimmy

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Or you just might need new vaccum hose it might be dry rotted. Tends to happen in most jimmys and blazers

Posted on Nov 15, 2009

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Check the control switch and the motor. you can remove the fan motor and jump it straight to 12v and see if the motor is faulty. if not than more likely will be the control switch. check fuse and relay also.

Posted on Nov 14, 2009

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Heater won t blow air


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Technically, that's impossible. The heating system in your car gets its heat from the engine. If the engine is running, then it will generate heat and there's no stopping that. The only thing that would prevent the heat from getting into the air that's blowing into the car is if the air selector is set to "Recycle" instead of "Fresh".

So, look at the controls for the heater and be sure that the air selector is pulling air from the outside and into the car.

I hope this helps.
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your cabin air filter is most likely clogged. instructions for replacement are in your owners manual.

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EITHER VALVE STUCK TO ALLOW WATER IN MATRIX OR YOU HAVE AIR BLOCK IN IT. TAKE OFF TOP HOSE AND RUN MOTOR, TOP UP RAD AT SAME TIME, USED A DESCALANT IF WATER MUDDY /RUSTY LOOKING

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