1999 Pontiac Firebird SWITCH WILL NOT CHANGE FROM FLOOR TO

1999 PONTIAC FIREBIRD
108,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
SWEETNLOW601
  • MEMBER
  • 3 POSTS
I have a manual switch. The air is stuck on the settin that splits it between defrost and floor as that is where I had it in the winter.

It will not switch to the dash vents. I've tried banging under the glove box to see if it would jiggle something in the switch or doors to make them move and it hasn't worked.

Any suggestions?
Jun 17, 2009 at 3:01 PM
Advertisement
Avatar
JDL
  • CERTIFIED EXPERT
  • 16,098 POSTS
If there is an actuator that is vacuum controlled, check the vacuum source.
Jun 17, 2009 at 3:22 PM
Avatar
SWEETNLOW601
  • MEMBER
  • 3 POSTS
[quote:7539309df5="jdl123"]If there is an actuator that is vacuum controlled, check the vacuum source.[/quote:7539309df5]

Thank you. We finally found it. It was the 3 way vacuum check valve located in the engine compartment closest to the firewall on the passenger side. It was cracked. Repair cost $6.00 part in stock at NAPA.
Jun 17, 2009 at 5:37 PM
Advertisement