Question about 2001 Pontiac Sunfire

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AC blows cold air, fans stop blowing

I start my car the air starts blowing like normal, after driving about 30 seconds to a minute the fans slowly stop running, then just cut off. If I leave the ac switched on, sometimes the air blasts right back on.... What is this???

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  • 11 Answers

I think you have a "variable speed resistor" problem, it's overheating. It's an electronic device usually located near or attached to the AC motor blower that controls the fan speed. This is a common problem with aging AC blowers with electronic controls.

Posted on Apr 13, 2014

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Posted on Jan 02, 2017

Brian032472
  • 150 Answers

SOURCE: 2004 pontiac gran prix gt

I would suggest replacing the blower motor resistor. When this component fails the blower will only work on one spped or none. This is a very common issue with all automotive models

Posted on Nov 04, 2008

  • 1 Answer

SOURCE: Overheating and heater not work

there is a valve on the water pump and one on the thermostat housing open those up one at a time until you get a little bit of antifreeze come out then tighten them back up. All you will be doing is bleeding the air out of the cooling system. my car was doing the same thing after I changed my thermostat.

Posted on Dec 12, 2008

  • 1118 Answers

SOURCE: heater fan blowing intermittently or not at all

Most likely it does, if you can hit the motor and it will run. I can't say for sure but you might want to chk. to see if you got a heater blower motor resister. There located (if its got one) around the heater motor and it controls blower speeds, might be worth checking out.

Posted on Jan 31, 2009

garydillon
  • 42 Answers

SOURCE: ac vent problem

Damper/flap for driver's side is probably stuck. Try moving the selector from cold to hot several times. Also, move the recirc/outside air control if the previous doesn't work.

Posted on Jun 02, 2009

  • 72 Answers

SOURCE: grand prix 3800 blowing only hot air please help

check the temp control switch in the dash

Posted on Jun 22, 2009

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