Question about 2000 Chevrolet Blazer

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Intermittant fan operation

It comes on when it wants! I pulled the fan motor and it works in all settings. The passenger dash gurgles when I accelerate and i suspect rain may have infiltrated and I must pull the dash. Not looking forward to that. Are there vacuum controls or are they all electric? Any tests for blend door oop?

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  • Marc Albertario
    Marc Albertario Nov 12, 2008

    Thanks, I'll try the resister first, I've done the driver side dash removal and I can't believe the larger passenger side will be easier! Again thanks for the tips, both.

  • Marc Albertario
    Marc Albertario Nov 14, 2008

    I metered the power at the input, ok. I pulled the fan and bench tested, ok. I pulled the resistor and cleaned the filaments and reinstalled. I hooked up the feed with the fan out and it worked. I cleaned the fan plate and reinstalled and it is working now! Why it wouldn't work to start is still a mystery. I'm checking the wiring for breaks etc. I also pulled the relay and bench tested it, it worked ok. I'll post if it quits, thanks for your input!!


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The system is all electric with no vaccum controls. what i believe is the problem is you have a bad resister which is mounted near the fan motor with a 2 wire lead to it replace this and the problem should be solved

Posted on Nov 12, 2008

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The dash gurgled because of the water passing through the heater core i think the fan controls are electronic but not sure you will have to pull the dash to check the blend door though

Posted on Nov 12, 2008


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