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
223,745

Rowefast answered 7 years ago

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

Mark helpful
30,895

Tom answered 7 years ago

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.
Mark helpful

Your Answer:

Related Questions

  • Pontiac heater blowing cold air. 2 Answers

    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 t...

    2003 Pontiac Grand Prix

    -

    Maintenance & Repair

  • 2004 Pontiac Grand Prix only blowing cold air when heater is on 4 Answers

    I have a 2004 Pontiac grand prix , I blew a head gasket and had it repaired. Since then the heater was only blowing slightly hot air and now it only blows cold air. The coolant level id good and the...

    2004 Pontiac Grand Prix GT1

    -

    Maintenance & Repair

  • Having a problem with the heater blowing cold air while its moving. 3 Answers

    I have a 2007 Pontiac Grand Prix and while it idles and i turn on the heater it works fine, but as soon as i start moving, it starts blowing cold air. I changed the thermostat, it has coolant, the h...

    2007 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • Grand prix blowing cold air 1 Answer

    Had my thermostat and water pumped replaced, but its still blow cold air and won't defrost

    2005 Pontiac Grand Prix

    -

    Maintenance & Repair

  • pontiac grand prix no cold air and no heat but the fan works, whats wrong 2 Answers

    pontiac grand prix no cold air and no heat but the fan works, whats wrong

    2006 Pontiac Grand Prix Base

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 6 nationwide Grand Prix listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,220
  • #2
    James Sparrow
    Reputation
    7,520
  • #3
    Dorian Hendricks
    Reputation
    6,160
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac GTO
5 listings
Used Chevrolet Impala
13 Great Deals out of 112 listings starting at $3,531
Used Chevrolet Camaro
25 Great Deals out of 346 listings starting at $10,500
Used Chevrolet Monte Carlo
8 listings starting at $3,000
Used Chevrolet Silverado 1500
212 Great Deals out of 5,926 listings starting at $3,995
Used Ford Mustang
55 Great Deals out of 1,257 listings starting at $4,995
Used Pontiac Firebird
13 listings
Used Chevrolet Corvette
22 Great Deals out of 1,002 listings starting at $19,500
Used Pontiac Grand Am
3 listings
Used Chevrolet Tahoe
15 Great Deals out of 714 listings starting at $5,995

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.