Question about 2005 Pontiac Grand Prix

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I have a 2005 Grand Prix that only blows out luke warm air. It has been a problem since I purchased it about a year and a half ago. I have flushed the radiator and put in a new thermostat. The fluid level is fine. What do you suggest doing next

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At this point i would change the heater core

Posted on Oct 10, 2010

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1 Answer

The heater on my 98 ford expidition blows hot air at first and then blows only Luke's warm. If I shut heat off and turn back on it will blow hot and then turn Luke warm why


-Sounds like the system is clogged or the on off valve is not open
properly.
-Check the valve and flush the system. It should be good to go.

Good luck

Mai

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Heater is only blowing luke warm air


I would have the thermostat replaced and have the antifreeze flushed or drained out. If the thermostst is over 4 years old and if the coolant hasn`t been flushed or drained out recently, then this will improve your heat situation..

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The engine is running at normal temps and we have flushed the heater core but it still is only luke warm air blowing out


drain the antifreeze ,then add water and when nearly full put about half a cup of caustic soda in the rad and run this for a day or so till teh heater get hotter then flush completely and then re add the antifreeze

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2002 grand prix, will not blow hot air, engine heats up fine and cooling system checks ok.


With the engine warmed up feel the heater lines going into the firewall. You will probably find that one is very hot and the other only look warm or even cold. If this is the case the heater core needs to be flushed. With the engine cold remove the hoses at a convenient location and back flush the heater core. Reconnect the lines and warm the engine back up with the heat on.

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How do you relace a heater coil in 2006 pontiac grand prix?


I don't want to over step my knowledge but you car is only 3 or 4 years old. I don't think your heater core is bad, unless it is leaking, Sounds like you have a blend door problem in the HVAC system. This door is actuated by a servo motor switching from hot side to cold side. This little servo can go bad and need replacing. Just make sure you don't have any bubbles in the coolant system first as long as you havent done any thing with the coolant system you souldn't have any air in the system Hope this helps you. Please rate my solution for you thank you

Jan 18, 2009 | 2005 Pontiac Grand Prix

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