Pontiac heater blowing cold air.

Asked by Mar 29, 2017 at 09:58 AM about the 2003 Pontiac Grand Prix

Question type: Maintenance & Repair

Okay so just yesterday morning i noticed my heater which
is on the highest temp in the mornings didnt blow any hot
air.  Speed fan was fine.  But when i noticed i started to
move the nobs ti cold then to heat.  Eventually it started
blowing hot air.  Then went back to cold then hot.  
Watching my car temp once it started to blow cold my
temp for the car it self would begin to rise.  A friend
suggested an actuator.  I have to look into it seeing how im
not really machanically inclined.  Any advice on what i can
do prior to getting bent over by a mechanic would be
appreciated.

2 Answers

73,035

Check the coolant level, may be low on coolant. Do this when the engine is cooled down.

9,890

After coolant lever check ,, adjust driver and passenger controls separately. If a bad actuator then only 1 side will be effected. odds are it;s the position sw (aims air at your face/feet/defrost etc). that switch is a combination vacuum/electrical sw. and the "O" rings either get worn or dry out (hot summer Sun over decades) .. That sw routes vacuum to the actuators ,,,

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,767 nationwide Grand Prix listings starting at $1,200.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,370
#2 Tom Demyan
Tom Demyan
Reputation 2,970
#3 munron
munron
Reputation 2,350
View All

Related Models For Sale

Used Chevrolet Impala
561 Great Deals out of 34,682 listings starting at $1,000
Used Pontiac Bonneville
522 listings starting at $1,799
Used Chevrolet Monte Carlo
13 Great Deals out of 1,354 listings starting at $995
Used Pontiac Grand Am
1,087 listings starting at $1,599
Used Ford Mustang
728 Great Deals out of 42,730 listings starting at $1,300
Used Chevrolet Camaro
422 Great Deals out of 31,644 listings starting at $2,395
Used Pontiac GTO
12 Great Deals out of 469 listings starting at $5,995
Used Chevrolet Malibu
1,215 Great Deals out of 78,019 listings starting at $1,500
Used Pontiac Firebird
11 Great Deals out of 816 listings starting at $1,900
Used Honda Accord
988 Great Deals out of 62,549 listings starting at $999

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
12 Great Deals out of 378 listings starting at $1,200
2007 Pontiac Grand Prix For Sale
13 Great Deals out of 368 listings starting at $1,350
2006 Pontiac Grand Prix For Sale
9 Great Deals out of 463 listings starting at $1,800
2005 Pontiac Grand Prix For Sale
4 Great Deals out of 359 listings starting at $2,350

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.