Question about 2006 Pontiac Montana

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2006 pontiac montana heater blows cold air what can cause this? I flushed the radiator and the heater core.

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Did it blow heat before?

Posted on Dec 07, 2016

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Posted on Jan 02, 2017

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1 Answer

Pontiac vibe heater blows cold air until moving


Check the coolant level first. When the engine is cold remove the radiator cap and look to see if the radiator is full. Top off as necessary. If it is full than there is a chance that the heater core is plugged and needs the extra RPMs from the engine to push more coolant through it. Heater cores can be back flushed and this should be tried before considering replacement. Back flushing works about 90% of the time.

If it does work I would recommend flushing the cooling system. Dirty coolant can cause the heater cores to plug up and you don't get a second chance if the heater core plugs up again, typically.

Feb 19, 2015 | Pontiac Cars & Trucks

1 Answer

My Pontiac montana 99 blows cold air,no hot and smell antifrize


likely leaky heater core. May try pellets that GM offers to seal small leaks. Contact dealer or good auto parts store. Rad pellets

Dec 10, 2014 | 1999 Pontiac Montana

1 Answer

How to change a bad thermostat on a 2003 3.4L pontiac montana


put in a radiator flush ,run it for 20 miles it can be a blocked core in both the radiator and the heater.that should clean it. then refill with a 50/50 mix anti freeze then bleed it of air. put your heater on full .run the engine on tick over.then push in the radiator hose to push the air out of the expansion bottle cap .it is off . then refit your cap.

Dec 30, 2013 | 2003 Pontiac Montana

3 Answers

Fans are blowin cold air but wont blow hot air


needs to replace the heater core

Apr 25, 2012 | Cars & Trucks

2 Answers

Overheating pontiac montana shooting out cold air from heater


Get the radiator and heater core, hoses and thermostat replaced. Also replace the mixing valve if needed. A radiator shop could give you an estimate and diagnose the problem better than I can online. I hope sincerly that this helps.

Mar 16, 2011 | 2003 Pontiac Montana

1 Answer

My 99 pontiac montana has a heater problem.after engine is warm the heater blows warm air for a few minutes and then blows cold for a few minutes and then warm again. sometimes it blows warm for a few...


I would change the Thermostat. if that doesn't fix it? I would buy a Radiator flush and follow the directions exactly you will be surprised how much junk comes out. That should fix all your heat problems.

Jan 07, 2011 | 1999 Pontiac Montana

1 Answer

2006 Pontiac Montana SV6 Front heater only blowing warm. Rear heater blowing cold.


First off make sure the thermostat settings are set the same on the control panel for both front and rear units if thats ok it could b a few possibilities. 1 pluged heater core in rear 2 blocked heater hose try looking into these and see if it helps any

Dec 10, 2010 | 2006 Pontiac Montana SV6

2 Answers

Runs hot and hearter not blowing hot air


a heater uses the temperature of the cars water, running threw a heat exchanger if the heater core has failed water will not circulate threw the engine properly this will and can cause over heating as well as nothing blowing from the heater. good luck.heater cores are generally inexpensive parts to replace.

last thing you can check if heater core is ok. is the thermostat.

Feb 18, 2010 | 1999 Pontiac Montana

2 Answers

I have a 2005 pontiac Montana. The heat in the


There is a flap in the venting itself that can get stuck. Or the actuator that moves it can become faulty. It is located above heater core and it's housing. You will have to remove bottom console to access it.

Nov 17, 2009 | 2005 Pontiac Montana SV6

1 Answer

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!

Dec 22, 2008 | 2004 Pontiac Montana

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