Question about 2006 Pontiac Grand Prix

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2006 Grand Prix - heater blowing cold air??? - 2006 Pontiac Grand Prix

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  • 91 Answers

Check your antifreeze and get a new thermostate put in a winter one ,ok.

Posted on Jan 03, 2011


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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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

  • 2359 Answers

SOURCE: heater went out in 2006 pontiacc grand

When the engine is cold,check the coolant level.

Make sure it's on max.


A coolant system should be flush every two years.


If you did a coolant flush recently then air pocket can be the cause of the un-even heating problem.

The DIY method is to drive you car onto a ramp or a steep hill.

Iet the engine cool off and top off the coolant tank.

Set MAX heat + MAX fan

Let the engine ran for 20 minutes wih the cap off and the trap air will escape from the coolant reserve tank,

Check coolant level and top off coolant when the engine cools down.

A shop will charge $75+ for this but using an air operated excavate tool!


A car with over 90K miles may experience linkage problem to the heater control valve.

The heater control valve (near the firewall) may be stick over time.

Open the hood and move the heater to max and min. Back and forth.

Clean and lube the linkage with WD-40 to free the heater control valve.

If it's a vacuum type heater control valve then cash for leaky vac. hoses.

Move the fan switch back and forth to re-new the electrical conductors.

Pass a vacuum over the control panel to prevent dust build up behind the console.

Posted on Dec 03, 2009

  • 4340 Answers

SOURCE: grand cherokee heater blows cold air

Check the coolant level, sounds like you may be slightly low....Be sure heater is on high when filling the system....Look for any air bleeds...

Posted on Dec 06, 2009

  • 31 Answers

SOURCE: The heater in my 2006 Dodge Grand Caravan only

Three possibilities:

Cooling system low on coolant. This causes erratic heater operation. Fill it and troubleshoot the leak.

Heater core plugged. Find this by bringing the engine up to operating temperature. With the blower on high, feel the heater hoses going into the firewall. They should both be pretty hot. One should be a little cooler - within 20 degrees of the other. If the core is plugged, the cooler one will be alot cooler than the hot one. Please note that restricted / poor coolant flow can mimick a bad heater core but is a rarity.

Blend door system malfunctioning. This can cause warm air when airflow is low but not provide warm air with higher airflow rates.

Posted on Jan 15, 2010

  • 454 Answers

SOURCE: Car Heater Not Working - Blowing Cold Air

also check to see if tube that runs your climate door is not pinched or broken. the vaccum tube that runs the climate door is behind and under the battery. i had same problem a year ago and the tube was partially cut. i fixed it by cuttinga piece of aquarium tubing and spliced it back together. one other thing.....check to see if your radiator over flow cap is tight. your cap maybe bad and or cracked this would also cause the problem.

Posted on Jan 29, 2010

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2006 Grand Prix Heater blows cold air only

The blend door is probably what is keeping the air from blowing across the heater core and picking up the heat. I hope your manual gives a description and procedure for it.

The blend door actuator and other heater case doors will be either vacuum operated with a few canister diaphragms situated around the heater case, or they may be operated with electric motors. If you pull off the lower sound insulator panels below the dash, you can see the bottom of the heater case, and then find the actuator for the blend door. If vacuum operated, check for vacuum. The vacuum for the heater/AC controls comes from a single line from the engine, through the firewall, and into the back of the control head or to a control module. Then, many vacuum lines branch out from this central point to the canisters- the heater/AC controls will direct vacuum to appropriate actuators, or servos.

Nov 12, 2013 | 2006 Pontiac Grand Prix

1 Answer

Heater only blows cool air out of heater

Check coolant level. If necessary, additional cooling fluid. It is possible that the air inside the cooling system.

Oct 11, 2012 | 2006 Pontiac Grand Prix

2 Answers

My heater does not blow any air out at all

You should first check the fuse, followed by checking the fan relay and fan switch, if you are able to use a volt/ohm meter, simply chase the circuit and test each component.

Dec 15, 2011 | 2006 Pontiac Grand Prix

2 Answers

I have a 2006 pontiac grand prix 3.8l my heat only blow cold aair I checked the thermostat and the heart inlet hose is hot but the outlet hose is luke war what could this be maybe clogged heater core.

Ok fellow 2006 Grand Prix owners!! By trial and error, I went through the process of elimination because my car would over heat and had no heat inside. After changing the thermostat, I had to replace the water pump. However, after you do this, you need to open the inlet hose bleeder and let the air out a few times. This solved my issue of overheating and I now have great heat!!!

Oct 23, 2011 | 2006 Pontiac Grand Prix

1 Answer

My heater just blows cold air.

If your heater just blows cold air the very first thing i would do is make sure there is coolant in your car. if there is not then there will be no heat.

Jan 10, 2011 | 2006 Pontiac Grand Prix

2 Answers

My heater on my 2002 pontiac grand prix blows hot then cold air my wife hit a huge pothole on sunday then after that this started doing this please help

check you climate control vacuum hose. it may have come loose or crimped. its located beneath and under battery mount box. also check to see if your coolant resvouir is full as well as your resivour cap is tight.

Jan 26, 2010 | 2002 Pontiac Grand Prix

1 Answer

2005 Grand Prix heater works fine when blower is off-air coming thru vent gets hot; once blower is turned on air turns cold. Why?

Sounds like a clogged heater core- insufficient coolant circulating through heater core, and as soon as you blow air past the core, it get cooled off.

Jan 09, 2010 | 2005 Pontiac Grand Prix

3 Answers

Power steering

the power steering pump is mounted on the front of the motor, the pump has a lid which you unscrew to add fluid. if you cant find the pump follow the serpentine belt until it goes around the pump (large Pulley) with about a four or so inch long neck. Make sure you buy the fluid made for your vehicle.

Nov 29, 2009 | 2006 Pontiac Grand Prix

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