Question about Pontiac Montana

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I was driving my 2000 Pontiac Montana with my heater on then all of a sudden it stop blowing hot air. Only cold air would come out of the vents.

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Ensure the coolent water level in your car system is full.
the heater radiator is set higher than the main system so when the water gets low there
is none in the heater.

as the fault came suddenly it also maybe the heater control switch or the thermostat has a problem
and has shut off the heat. check fuses to ensure there is not a problem there.

I hope this was helpful.

Posted on May 23, 2011

  • j_v_j_max May 24, 2011

    Thank you Maaaartin! Do you think it could also be the heater blend door actuater?

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Jan 27, 2016 | 2000 Chrysler 300M

1 Answer

2003 Pontiac Montana heat gets hot in front, blows but seems weak, and no heat on rear controls but blows ******* rear. what is going on?


Is your heater blower motor working on all speeds ? Are you get any air coming from the rear vents ?

Feb 25, 2015 | 2003 Pontiac Montana

1 Answer

It blows out hot air even when the air in the front is cold


Hard to read your question, do you mean it blows cold air out of the front vents and hot air out of the rear passenger vents?

If the air coming out of the front is just cool and not cold, and the rear vents are warm, you have low freon and need to have it serviced.

Jun 03, 2011 | 2000 Pontiac Montana

1 Answer

2000 montana, No heat all of a sudden. Motor comes up to temp blows cold. What could it be?


it sounds like the heater core is stopped up and the hot air can not blow thru

Mar 04, 2011 | 2000 Pontiac Montana

1 Answer

2000 montana ac not cold also the front right vents blows very good cold but not to cold and the left side doesnt blow very cold and not cold


sounds like it might be a little low on freon and/or might need the cabin air filter replaced,try replacing the cabin air filter first,its located behind the glove box,hope this helps

May 27, 2010 | 2000 Pontiac Montana

1 Answer

I have a 2000 pontiac Montana. The problem is with the coolant


We have the same problem. It's an air pocket in the cooling system. The cause can be anywhere from not filling the system all the way or most likely a leak has developed and air has entered into the system as the coolnt level has dropped. The coolant light goes off and on as the air pocket moves around.

Our Montana has a leaky intake gasket, which is the source of the problem. A very common problem with the 3.4. It should go for another 100K plus though, once it is repaired.

Jan 26, 2010 | 2000 Pontiac Montana

1 Answer

The ac blows hot air in the front and cold air in the back


Either the door that controls whether air from the heater or ac is stuck in between or the ac system is having trouble. Minivans sometimes have seperate compressors for the rear and front.

Sep 17, 2009 | 2000 Pontiac Montana

1 Answer

2000 pontiac montana air conditioner driver side vent blow warm air yet passenger side and rear vents blow cold air. sometimes the driver side vent blow cold air. is flapper valve stuck sometimes?


That is correct, the air blend door actuator. "flapper valve" may need to be replaced or cleaned and free from binding up. Good luck and hope this helps. If there is an Auto Zone in your area, they can order the part you need and give you the step by step instructions to removing the old actuator and replacing it if it's damaged. Good luck and keep me posted, be glad to help. 

Aug 22, 2009 | 2000 Pontiac Montana

1 Answer

Air Conditioning blowing cold out of all but 3 front vents


Vacuum line has to be connected to this system in order for it to work properly.

May 28, 2017 | 2000 Pontiac Montana

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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