Heater fan does not run all the time - Team Camaro Tech
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post #1 of 3 (permalink) Old Dec 11th, 11, 03:11 PM Thread Starter
Join Date: Dec 2005
Posts: 5
Heater fan does not run all the time

I have a 2000 Blazer. The heater fan does not run all the time and when it begins to run, it will run until the vehical is shut off. Sometimes it will run when you restate the vehical but not all the time. The controls check out ok. The heater warms the car and the defroster also works fine. I am beginning to think it is the vacuum system, but I have no clue where to start. Any ideas?


hotrodgasket is offline  
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post #2 of 3 (permalink) Old Dec 11th, 11, 04:07 PM
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Join Date: Jun 2007
Location: Iowa
Posts: 3,126
Re: Heater fan does not run all the time

John, There is most likely a resistor in the system that has gone bad. Most
are located behind the glove box. You will have to remove the glove box to
get at it. It's a fairly common Chevy truck thing.


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post #3 of 3 (permalink) Old Jan 3rd, 12, 06:27 PM
Senior Tech
Join Date: Jan 2010
Location: nova scotia canada
Posts: 171
Re: Heater fan does not run all the time

the motor itself might be bad ,next time it wont go just give it a tap with you hand if it starts it is in the motor
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