2001 Pontiac Grand Am Heating/Cooling Fan only runs on high

Tiny
KJWILD
  • MEMBER
  • 2001 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 75,000 MILES
I have to leave my heating/cooling switch turned to high in order for the fan to blow heat or a/c into the car. What could be wrong?
Wednesday, May 12th, 2010 AT 10:54 AM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Hello and thanks for donating

The first place to start troubleshooting this would be checking the blower motor relay. If the relay tests good then you will need to test the actual switch itself that you use to operate the heater/ AC. If it tests good also then check the wiring and blower motor resistor.
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Wednesday, May 12th, 2010 AT 5:07 PM

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