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2004 pontiac montana front won't blow air, back does blow, no defrost in front

Two days ago the blower was working, then stopped, then I turned knobs back and forth several times and it started working again. Yesterday, it was blowing fine set on 3, but when I moved to 5 it stopped blowing completely. Cannot get it going again. Is it the blower motor, switch, thermostat, mode/temp actuators???

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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tripletauto
  • 1450 Answers

SOURCE: Blower not blowing

can you hear the fan working on all speeds?

Posted on Sep 22, 2008

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salsaurbana
  • 56 Answers

SOURCE: 1999 Pontiac Grand Am Overheating

It is probably the problem. To make shure that need to change the gaskets, one of the symptoms use to be thet the temp rises when you are running at speed 50+ average, where is supposed that the car gets a lot of air due by the speed and nobody thinks that will be overheated.

Posted on Nov 19, 2008

dgjtex
  • 405 Answers

SOURCE: 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!

Posted on Dec 22, 2008

  • 37 Answers

SOURCE: 1999 Pontiac Grand Am Overheating

I had the same problem on my 1999 Pontiac GA 3.4 litre. Replaced a bunch of stuff. It just kept pushing the coolant out the overflow once the temp got to 200 + like to drove me nuts. Ended up being that reservoir. If you measure the O.D. of the cap(brand new cap) and the I.D. of the reservoir filler neck there is no way it will seal(even tried to fit a different type cap,no luck). The system has to be able to build pressure or the coolant will boil out at 212. Causing the coolant to be pushed out the reservoir. Why? you say or How? did the filler neck increase in size. I dont know but GM has write ups about this problem. They say sand it with a piece of sandpaper to smooth it. Maybe someone sanded it way to much?? Around $40 bucks and I was on my way. Hope this helps someone.

Posted on Apr 11, 2009

moparownr
  • 667 Answers

SOURCE: 2004 Ford Expedition XLT, front blend door actuator

Hope I was avle to help, glad you up and going.

Posted on May 27, 2009

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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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Pontiac montana heater works but doesnt blow heat out on defrost


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Dec 20, 2008 | 2001 Pontiac Montana

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