Pontiac heater blowing cold air.

Asked by Sherwood84 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

223,915

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

30,935

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 ,,,

5 people found this helpful.

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 193 nationwide Grand Prix listings starting at $5,522.

ZIP:

Own this car?

Share your experience with others.

2003 Pontiac Grand Prix

Review another car

CarGurus Experts

  • #1
    munron
    Reputation
    8,230
  • #2
    James Sparrow
    Reputation
    7,520
  • #3
    Dorian Hendricks
    Reputation
    6,170
View All

Know more, shop wisely

Search

Related Models For Sale

Used Pontiac GTO
10 Great Deals out of 200 listings starting at $10,950
Used Pontiac Firebird
5 Great Deals out of 368 listings starting at $6,991
Used Chevrolet Corvette
804 Great Deals out of 14,606 listings starting at $4,999
Used Chevrolet Impala
235 Great Deals out of 3,869 listings starting at $1,500
Used Ford Mustang
1,003 Great Deals out of 19,953 listings starting at $1,950
Used Pontiac Grand Am
42 listings starting at $3,667
Used Chevrolet Camaro
641 Great Deals out of 8,424 listings starting at $3,240
Used Chevrolet Monte Carlo
3 Great Deals out of 199 listings starting at $3,500
Used Cadillac CTS-V
8 Great Deals out of 94 listings starting at $16,997
Used Chevrolet Tahoe
1,437 Great Deals out of 34,853 listings starting at $1,550

Used Cars for Sale

2008 Pontiac Grand Prix For Sale
25 listings starting at $6,997
2007 Pontiac Grand Prix For Sale
27 listings starting at $6,495
2006 Pontiac Grand Prix For Sale
24 listings starting at $5,522

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. Content will be removed if CarGurus becomes aware that it violates our policies.