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Tiny
CMONTE1995
  • MEMBER
  • 2003 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 94,000 MILES
My 2003 Grand Prix stop blowing air conditioning and heat. Number 5 on the switch went out first now nothing works. Checked the fuses they are fine. What could it be?
Thursday, August 4th, 2011 AT 6:41 PM

13 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You probably have a burnt out blower resister which could have been caused by a blower motor drawing excessive current and overloading it.
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Thursday, August 4th, 2011 AT 7:37 PM
Tiny
RICHARD69
  • MEMBER
  • 1 POST
Replace resister under dash. By the blower and you should be fine.
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Thursday, August 4th, 2011 AT 7:53 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I just said that but it was probably caused by a tired blower motor which may have to be changed also to avoid it burning out again.
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Thursday, August 4th, 2011 AT 7:57 PM
Tiny
CMONTE1995
  • MEMBER
  • 8 POSTS
Going to get resistor right now. I will let you know if it works. Thank you
Cheryl
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Thursday, August 4th, 2011 AT 8:30 PM
Tiny
CMONTE1995
  • MEMBER
  • 8 POSTS
Crap that didnt work. I will replace blower motor this weekend I hope that cures my cars issues. Do you have any other ideas if that doesnt work either?
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Thursday, August 4th, 2011 AT 10:28 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You need to test the blower motor before throwing any more parts at it.
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Thursday, August 4th, 2011 AT 10:42 PM
Tiny
CMONTE1995
  • MEMBER
  • 8 POSTS
I will as soon my son gets home with the meter. Thanks
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Thursday, August 4th, 2011 AT 10:50 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You need to jump power and ground directly to the motor to test it. If it turns out OK, then you will need to determine whether it's power or ground that it's missing.
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Thursday, August 4th, 2011 AT 10:52 PM
Tiny
CMONTE1995
  • MEMBER
  • 8 POSTS
Thanks I will let you know tomorrow. I just glad the heat wave in Chicago ended for a minute.
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Friday, August 5th, 2011 AT 12:10 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I'm in South Florida. It never ends here.
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Friday, August 5th, 2011 AT 12:12 AM
Tiny
CMONTE1995
  • MEMBER
  • 8 POSTS
Stay cool my friend !
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Friday, August 5th, 2011 AT 12:45 AM
Tiny
CMONTE1995
  • MEMBER
  • 8 POSTS
Changed resistor and blower motor. Thanks guys it works fine just in time to turn off the air and crank up the heat.
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Thursday, September 15th, 2011 AT 9:23 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Glad to hear it.
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Thursday, September 15th, 2011 AT 10:05 PM

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