AC/ Heater blower works sporadically

Asked by GuruN7KHY Nov 09, 2019 at 05:36 AM about the 2007 Pontiac Grand Prix

Question type: Maintenance & Repair

Blows strong when pressing accelerate gas pedal.  Gets
weaker braking.  Sometimes won't turn on until you hit a
bump.

1 Answer
18,245

munron answered 4 years ago

If it blows more hot air when you accelerate that's a sign of low coolant Topping up your system should fix that. If its not turning on that could be the resistor in the heat duct on the passenger side.Could also be faulty wiring or a loose connection somewhere which will take some searching. Could be other things too, but that would be a good place to start.

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