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2007 pontiac heater blows cold when idleing

Heater blows cold when idleing

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1994 pontiac firebird HAS NO HEAT

Okay. warm up vehicle, get radiator hoses hot.  Turn on heater, fan on low.  Grip both rubber heater hoses close to the firewall, from the engine compartment side.  They should be too hot to hold for long.  If they are not hot, then you have a lack of coolant circulation to the heater hoses.  If they are hot then access heater core, behind glove box area.  Blend door which moves as you chose HOT or Cold, should be cable controlled, move the controls and be sure the door is actually moving. Keep me posted 

Posted on Dec 17, 2008

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dgjtex
  • 405 Answers

SOURCE: 2004 Pontiac Montana blows cold air in defrost

There is a mix damper inside your duct that controls the heat over heater core and ac evaporator that to your floor and one to your defrost. it is probable an electric actuator, that is not functioning properly. If yu can locate it and manually move it, you might have to remove the actuator motor first, you should be able to figure out your problem, I hope this helps! merry Christmas!

Posted on Dec 22, 2008

dgjtex
  • 405 Answers

SOURCE: 2005 Pontiac Montana SV6 heater blows cold when slowing to idle

How cold is it there and does your engine cool down any while going slow? If it does it may mean you need a hotter thermostat installed, My first thought would be to check the coolant level in the radiator and the coolant reservoir! Hope this helps and Merry Christmas

Posted on Dec 23, 2008

  • 70 Answers

SOURCE: the blower motor and AC works but the heater

if your vehicle has the electronic climate control, it is probably the blend door motor/actuator that has failed and is stuck at the temp that was last entered in the climate control unit when it failed. this can be a very time consuming repair to do as it is under the dash. the other possibility is your coolant level is low and not allowing the heater core to bring the outside air up to the temp you want. if that is the case,your low coolant temp sensor should have come on. if not, then the thermostat could be either stuck open or closed. if stuck open the engine would not always show the temp gauge at normal operating temp of 195-200 degrees. if stuck closed the engine should be overheating according to the temp gauge. you did not mention what the operating coolant temp was!

Posted on Oct 24, 2009

roniecon
  • 6918 Answers

SOURCE: heater blowing cold air on my 2003 pontiac grand

It could be a temp door actuator motor that is gone out,it opens the door to the heater box.

Posted on Nov 15, 2009

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Blows cold air turn heat on


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My 2007 Pontiac g6 blows cold air in heat mode. Coolant level is okay


Possible blend door motor inoperative or restricted heater core. Once engine is at operating temperature feel the two hoses going into the heater core. They should be close to the same temperature. If one is hot and one is warm/cold, the heater core is restricted. If both close to the same temp suspect an inoperative blend door motor that controls airflow/heat inside the car

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Why does the heater blow hot air when I drive after its been idling for 15min and not during the idle when it reaches the 100 Temp?...(it blows cold air in idle)


Firstly, a thermostat that opens quicker will not give you better heat. Your heater core may be partially plugged causing a low flow issue. Another area to check would be the water pump impeller for corrosion or slipping on the shaft. Does the vehicle's cooling system operate well otherwise?

Jan 27, 2015 | 2002 Pontiac Grand Am

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What makes my heater blow cold air in my 2007 Pontiac Soltice


Low on coolant or bad thermostat are the first two thing you should be investigating.

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Heater blowing but no heat


Are both heater hoses getting hot ? And is the cooling system full of liquid ? It could be a blend door problem under the dash.

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2007 Pontiac Grand Prix heater dosent work


blend door actuator stuck on cold setting .... make sure ur not low on coolant to cause that will always mean no heat

Jan 04, 2014 | 2007 Pontiac Grand Prix

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2007 Pontiac Grand Prix heater problem


blend door actuator failing and sticking on cold setting

Nov 13, 2012 | 2007 Pontiac Grand Prix

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My heater is not working except on one side in my 2007 impala driver side it blows warm passenger cold


To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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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

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

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Heater blows intermittently and temp gauge goes erratic? http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html------------Heater blows cold? http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
---------Car heater blowing warm, but not hot air? http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html-------- Heater/AC blower motor not working?

http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html

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A/C, heater, defroster fan, not working? http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html Heater problem? http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html---------

This will help.Thanks.

Feb 27, 2012 | 2007 Chevrolet Impala LS Sedan New Cars

1 Answer

Replaced the therastate in a 2007 pontiac grand prix. what could be the problem it still doesn't heat good


clogged heater core very pop prob. check both hoses to firewall from back of engine pass side to make sure they are equal tmep if not it is a bad heater core you can flush these by removing the hoses and blowing them out with air or a garden hose also check to see if you hear a door closing in the vents when switched from hot to cold if you do it is safe to say itis a heater core

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