I have no heat in the front. Rear heat works. Replaced blend door actuator and flushed radiator. Still no heat. Any ideas?


Asked by Nov 11, 2014 at 07:51 PM about the 2006 Pontiac Montana SV6 Base Minivan

Question type: Maintenance & Repair

17 Answers


When is the last time you changed your cabin filter?

5 out of 5 people think this is helpful.

Never thought of that.....could that be the cause?

1 out of 1 people think this is helpful.

Yes it could be that simple. Does the front blower motor work? Could also be a plugged heater core but start with something simple. Cabin filter, then the blower motor then heater core.


Front blower works fine...just blows cold air! I'll try the cabin filter. No sure where the heater core is located.

3 out of 3 people think this is helpful.

If the blower motor works it probably isn't going to be the cabin filter. I would still check it and make sure it's clean. The heater core is behind the glove box in the fire wall. Before you look at that possibility, check you coolant level if it's low you won't have any heat. If that is the case you now have the problem of looking for a coolant leak. The thermostat could be bad as well.


I get rear heat, so I was thinking the thermostat is ok. Is this wrong?

1 out of 1 people think this is helpful.

Does the temp gauge work? If it does and its up near 185/195 area then thermostat is ok. You don't by chance live in Illinois do you?


Temp gauge working. I live in Northwest Indiana. Why?

1 out of 1 people think this is helpful.

I'm looking at buying an 06 Montana on Craigslist for my wife and it has the same problem. I thought if it was yours that would be REALLY a weird coincidence.

2 out of 2 people think this is helpful.

Are you sure you installed the blend doror correctly? It was plugged in all the way? Did you check the fuse box? You might have blown a fuse when the door motor died?

1 out of 1 people think this is helpful.

That is funny! I will check the blend door again along with the fuse. I appreciate all of your help so far. This is my first attempt at repairing my car myself.


Yea for a few minutes there I was like "Woah this is a lil freeky", LOL. No problem on the help. I'm a HUGE Pontiac nut/ car nut and enjoy helping people with car stuff if I can. When you're down under there checking the blend door and it's connections, use a test light on the plug and see if you have current to the plug. You might have to have somebody change the settings on the heater controls while you're under the dash. If you have current then plug in the blend door and listen for it to move. It could be a bad unit out of the box. It does happen, sometimes.


Thanks. I'll keep you posted.....


no problem, good luck


I have the same problem with my Montana....mine is a 2007. I have lots of rear heat, but just about freeze to death on long winter drives. My husband was told about unhooking the battery terminals and give it a few seconds, then before hooking them back up touch them together - will this work?

5 out of 5 people think this is helpful.

I have the same problem but my van is a 2000 i changed the heater core and checked fuse it still not workn flushed coolant i dont kno where else to look...

1 out of 1 people think this is helpful.

In my van....it took a long time to find out the problem....I went through 2 winters with it - had to use an electric heater to get the windshield clean before I could go anywhere. Anyway, the problem was finally found - it was a cracked T something (some sort of pipe). Now I have heat - Yahoo!!!

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