The Heating And Air Conditioning Just Stopped Working In My 2000 Pontiac Grand Prix Today. Any Ideas?

it was around 15 degrees out and it worked for about 15 minutes then just stopped blowing, now it works for maybe 10 seconds and turns off

  1. Comment by Don k
    December 15, 2009 @ 7:32 pm

    I have been a mechanic for many years. I could tell you that there has been an on going issue with the GM vehicles not having proper heater blower motors installed at the factory. I have been replacing these motors on the Pontiac vehicles since 1996 when they came out with the “new” grand am. The blowers have had bad resisters built in to them, causing them to over heat and burn out. You need to replace the motor. There has also been a few issues with the fan relay (under the hood) burning out too. The relay is burning out because of the over heating motors. I hope this helps. Good luck.

  2. Comment by **~~RED~
    December 15, 2009 @ 8:51 pm

    Lately , I have seen so many people with 99-2004 Grand Prix with this same problem …I too have a 2001 Grand Prix , and my a/c and heater doesnt work half the time , and if it does it has to be on 5 if not the head light flash on and off , I replaced fuses , blower motors , and so much more, and nothing fixed the problem except for one thing , and the Techs at GM did not believe what was going on and so on , to get to the point something in these cars is shorting out the Ignition switch , there fore making certain things malfunction … I have replaced my ignition switch and all worked perfect for about 6 months actually I dont think it was that long , and now I am in the same boat again the heat will not work and even more … Took the car back to the shop they wanted to replace everything again and I was like no it hasnt even been that long … so i took the car to my dads friend who is a mechanic and he replaced the ignition switch again , and now everything is working again .

  3. Comment by lbhietal
    December 16, 2009 @ 2:26 am

    Is it on a circuit breaker instead of a fuse? Sounds like the bushings in the blower motor are going bad, overheating the breaker which trips out, then it needs time to cool off and reset, then it overheats and trips again.
    New motor needed.

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