1998 Chevrolet Lumina air conditioner fan blower motor

1998 CHEVROLET LUMINA
135,000 MILES
Avatar
FATZ1551
  • MEMBER
  • 3 POSTS
As I start my car and its idling the fan blower puts out a lot of air through the vents. I then put into gear and start driving down the road and the blower stops, take my foot off the gas pedal and the blower starts working again, press on gas pedal and the blower stops??????? When ever the car is idling or coasting it will blow press gas and it will stop???????? Ron
Sep 10, 2013 at 10:30 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Ron:
Is the blower motor actually stopping or is the air flow changing directions? In other words, the air is changing where it comes out and you no longer feel it.
Sep 10, 2013 at 11:02 AM
Avatar
FATZ1551
  • MEMBER
  • 3 POSTS
you no longer feel the air coming out of the vents but when you leave up on gas pedal it blows out the vents again. You can hear blower slow down don't know if stops. Ron
Sep 10, 2013 at 11:08 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Ron:
I think you are dealing with a vacuum issue. The vent doors in the HVAC system are actuated by engine vacuum. When you press on the throttle, the vacuum drops in the engine. Therefore, if there is a leak, the air flow can change directions when the vacuum is weak. Check under the dash for leaks as well as on the engine.
Sep 10, 2013 at 11:22 AM
Avatar
FATZ1551
  • MEMBER
  • 3 POSTS
Ok tomorrow let you know if I find something.
Sep 10, 2013 at 11:29 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
I'll look for your reply.

Joe
Sep 10, 2013 at 11:34 AM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle