Question about 2006 Pontiac Grand Prix

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Heater only blows cold air. had the system flushed a couple of months ago and just turned heater on for first time since then and no heat.

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Chek the heater welv or wash aut the radiator

Posted on Nov 12, 2010

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6ya6ya
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Sounds like ur ac pump is locking up its time for another one and also is your coolant level okay maybe ur heater core went out they dont give early signs of quiting they just go out

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If your heater is spraying a light mist through your vents it could be your heater coil. Mine did the same thing, smell rubber burning, then started a light mist through the vents. If you don't get that checked out, it could mess up your water pump and possibly your engine

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Heater core is working properly but car will not blow hot air only cold air i am thinking the flapper that controls hot \ cold is stuck in the cold air position


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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This will help.Thanks.

Jan 25, 2012 | 2001 Buick LeSabre

1 Answer

When your heater blows cold air


flush the cooling system, probably clogged. happened to me a bit ago with a 99 cherrokee. hope it helps ya.

Dec 18, 2011 | 1999 Ford Taurus

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I have a 2000 Chevy Silverado pickup, and the heater will not blow hot air. I replaced the thermostat, and nothing changed. The radiator was flushed and filled in the last two months as well. I have all...


once truck is warm check both heater core hoses to make sure they are both warm if not then check the cold water valve could be stuck shut not allowing coolant to travel in to heater core.

Jan 05, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

No heat air is blowing cold


First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is worm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater core.

Oct 22, 2009 | 1998 Ford Taurus

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1998 for taurus heater wont blow hot air only cold .was driving down the road I TURNED THE HEATER OFF FOR A COUPLE MINUTES WHEN I TURNED IT BACK ON IT WOULD ONLY BLOW COLD AIR.IT IS ELECTRONIC SWITCH'S.THE...


you need to check the blend door in the heater box it maybe broken or stuck.the blend door switches between the heater core and ac evaporator to provide a mix of temperature

Oct 18, 2009 | 1998 Ford Taurus

1 Answer

Heater blowing cold air with coolant, fine with plain water


it sounds like the heater core is clogged bad if u know someone with a air compressor put a air nossel on it that you pull the trigger to blos air in to the heater core after you take the lines off i had to do this before on a jeep cherokee it did the job

Jan 11, 2009 | 1994 Toyota Previa

1 Answer

Cold and no heat


This is a common complaint for the 4.3 v-6 by GM, what happens over time is air gets into the cooling system, usually a small coolant leak at the intake manifold gasket. Ait gets in the cooling system and starts electrolisis. From this the coolant starts to solidify. If I'm correct your heater core is plugged. Remove the radiator cap (engine cold only) and inspect the coolant. The proper color should be red. If the elctolisis is taking place the coolant will turn to rust and look like mudd. If you find mudd in the radiator, most likely the heater core is plugged. This is a very expensive repair. You'll need to remove the raditor & sent it out to be boiled out. Replace the heater core, thermostat and the coolant hoses. You'll also need to perform a "prestone" flush. You may need to flush the cooling system monthly until the system is clean.

Oct 17, 2008 | 1998 GMC Envoy

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