Does anyone know what the problem could be for no heat or a/c in 2007 Grand Prix?

Asked by Dec 10, 2014 at 05:09 PM about the 2007 Pontiac Grand Prix GT

Question type: Maintenance & Repair

I currently have no heat or air conditioning in my car. Originally I noticed when the blower motor wasn't functioning, so after checking fuses (all appeared fine), I replaced the blower motor and still no heat. I then replaced the resistor and still no luck. As for the control dials, they appear to be working. does anybody have any advice on what the problem could be?

1 Answer

3,715

Did the blower motor quit all at once or did you slowly lose it speed by speed? The gradual loss of a blower motor is the failure of a resistor down by the firewall inside the car. You can probably change it yourself although it is a bit tricky and helps to be a contortionist. Check on you tube. There are vids there on how its done. Any autopart store can get the part.

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