Question about 2002 Pontiac Grand Prix

2 Answers

Overheating and heater not work

When i start my car to defrost my windshield the temperature gauge rises above 210 and blows out cold air, but when i drive down the highway the temperature drop back down to about 180 and the heater starts to work. Then when i stop at a stop light the temperature rises again and starts to blow out cold air again. What could the problem be?

Posted by on

  • 2 more comments 
  • dustin_66215 Dec 02, 2008

    I have the same problem and I have changed the thermostat and my coolant level is full.

  • dustin_66215 Dec 05, 2008

    I replaced the thermostat last winter and the coolant level is full. By the way I want to think you for answering my questions.

  • Anonymous Feb 05, 2009

    my car doing da same thang

  • Anonymous Mar 18, 2014

    Windshield defroster stopped blowing

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

There is a valve on the water pump and one on the thermostat housing open those up one at a time until you get a little bit of antifreeze come out then tighten them back up. All you will be doing is bleeding the air out of the cooling system. my car was doing the same thing after I changed my thermostat.

Posted on Dec 12, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Sergeant:

    An expert that hasĀ over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 393 Answers

A bad thermostat. check coolant level also

Posted on Nov 16, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Heater only blows cold air and temp gauge does not work


It sounds as though the engine coolant thermostat is stuck open or worn out preventing the engine from warming up properly.

I am wondering if the temperature gauge starts to rise when the car is stationary with the engine running for extended periods. If so it is probably the thermostat that is faulty.

Feb 03, 2015 | Cars & Trucks

1 Answer

I have a 2002 Alero. The thermostat and water pump were replaced and it was still overheating. I replaced both hoses thinking they were weak. Now the issue is that as the temperature gauge rises the heater...


You have to bleed the air out of the system, there is a small brass valve( maybe 2 valves in the front of the engine compartment ) that must be opened to allow the air to escape. Engine must be running while bleeding the coolant

Nov 25, 2013 | Oldsmobile Alero Cars & Trucks

1 Answer

My 2009 Peugeot 308's heating is baffling me when i drive at normal speeds say 30 and above the engine temperature gauge never rises and the heater doesnt work but when im in traffic or parked with th


Thermostat may not be working properly, hot coolant has to circulate via the heater core in order to get heat. Normally operation temperation should be 180 to 200 degrees.

Nov 21, 2013 | Peugeot 308 Cars & Trucks

2 Answers

Heater blowing out cold air


Several things.
If the heater hoses are hot, the problem could be a blend door under the dash. The blend doors direct air thru the heater core and out the vents.

Jan 24, 2013 | 2005 Dodge Caravan

1 Answer

No heat from vents


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------


No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | 2006 Ford Taurus

2 Answers

Heater not working it is blowing cold air at all times is there a


Heater blowing cold air until I get on the interstate, then it works; however, when I stop at lights it starts blowing cold air again. The temperature gauge will be in the middle but the car will still be cold until the car starts moving.

Nov 14, 2009 | 2002 Jaguar X-Type

1 Answer

2004 Tahoe Heater Problem


check coolant level ,must be low ,chck for coolant loss

Mar 04, 2009 | 2004 Chevrolet Tahoe

Not finding what you are looking for?
2002 Pontiac Grand Prix Logo

681 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

60769 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...