Question about 2004 Pontiac Grand Am

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Vent fan is not shutting off

The fan that circulates air in the cabin of my 2004 grand prix is not shutting off; not when the fan switch is in the off position, and not when the car isn't running. What could be the possible reasons for this occuring? I am afraid that the battery is going to die if this problem isn't fixed.

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The blower motor speed control module is most likely shorted. This is very common on the gm w-body cars such as your grand prix.

Order and install a new blower motor speed control module and install. It is located in the hvac box, passenger side, near the blower motor.

Posted on Sep 21, 2008


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Hot air forced into cabin while driving 92 saab 900

the air distribution switch controls the air distribution and the fan, distribution switch in the 0 (straight down position) will be off. Car movement forces air into teh body, but with teh fan off there will be no air when the car stops. Does the fan run when the distribution switch is in any other position? it should respond to the speed settings of the fan switch.

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Do you hear any noises if you turn the distribution knob while the car is running? suction noises, or flaps opening?

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But check the vacuum accumulator first, if under the spare wheel, the lines are easily dislodged.

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i have the same problem on my 84 grand prix..ther is black wire that heat runs through i broke my cause it was so old an dry rotted an the heat stoped coming out the vents but comes through the dash by the winshield

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