Question about 2000 Pontiac Montana

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Heater fan blows fine in all speeds, but not much air comes out of ducts?

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  • 114 Answers

Check your cabin air filter and see if it is plugged way up. These cost about 20 dollars to replace.

Posted on Apr 18, 2013


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Posted on Jan 02, 2017



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SOURCE: Fan switch speed does not change from speed 2 to speed 3

it is all in the switch, it should only be a few bucks at a parts store and all you have to do is pop the the dash off and replace that switch.

Posted on Aug 11, 2009


  • 1 Answer

SOURCE: heater wont blow warm/hot air

check your radiator coolant, thats what I did and it blows warm again

Posted on Jan 15, 2009


  • 405 Answers

SOURCE: 2005 Pontiac Montana SV6 heater blows cold when slowing to idle

How cold is it there and does your engine cool down any while going slow? If it does it may mean you need a hotter thermostat installed, My first thought would be to check the coolant level in the radiator and the coolant reservoir! Hope this helps and Merry Christmas

Posted on Dec 23, 2008


  • 70 Answers

SOURCE: volume of air coming from a/c ducts is very slight

sounds like a bad blower resistor-thats why you have no speeds 1,2 or 3. the resistor will either be near the blower motor(the squirrel cage u spoke about) OR under the dash on the passenger side just above wher the passengers feet would will have usually 2 screws holding it in and wires going to it.

Posted on Sep 07, 2009


  • 124 Answers

SOURCE: fan is okay on heater but no warm air coming out.

Could be the valve that controls hot water to the heater core or the heater core its self try flushing the cooling system 1st if that doesn't
help the control wire to the valve may have come loose at the valve or the back of the heat control
hope this helps

Posted on Nov 15, 2009

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1 Answer

Heater is blowing cold air and there is a noise coming from around the blower motor area?

Check your coolant reserve tank and fill it if needed.

If the coolant is fine try flushing the heater core, follow ChrisFix's instructions in the vid linked below.

How to Flush Heater Core Safely with garden hose

As a side question:
Were there any loose wires that could have been caught near the fan when you replaced it? They'll make a buzz noise if they're touching the fan blades.

Jan 18, 2016 | 1991 Honda Accord

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How to fine defrost noise when turning heat on

This can be many things, but most common is debris in the heater fan motor area. Hard to fix without removing fan motor and blowing out heater ducts, but sometimes compressed air blown through ducts can clear it out.

Feb 22, 2015 | Cars & Trucks

1 Answer

The heater is working, if you touch the duct is hot. but no air is blowing out.

Try your blower on all speeds. Sometimes the high speed will work and that would mean you have a bad resistor for the fan motor.
If it doesn't work on any speed you could have;
1. A blown fuse.
2. A bad fan switch.
3. A bad connection/short somewhere between the switch and the fan motor.
4. A bad fan motor.

This is the order that I would troubleshoot from.

I hope this helps you.

Feb 03, 2011 | Chrysler Town and Country Cars & Trucks

1 Answer

2005 Jeep Liberty Heater fan motor speed control , no low speed only med & high there a fuse for low speed?

Sounds like low speed coil in the Blower Fan resistor block has failed. The Blower Fan Resistor Block is usually located in the air ducting adjacent to the Blower Fan. The Resistor Block consists of 3 or 4 coils of special resistance wire attached to terminals which connect to the wiring that comes from the fan switch and then to the Blower Fan. The block is on the output side of the fan unit so that the airflow from the fan past the coils inside the duct assists in preventing them from overheating and burning out.
Access to the Resistor Block is from under the dash. To replace, remove the multi-pin connector and then undo the screws holding in the block. Check air duct for leaves and dirt which may have caused the coils to fail. .Replacement is the reverse procedure

Nov 27, 2010 | 2005 Jeep Liberty

2 Answers

No heat

your blower motor resistor needs to be replaced if you only have one speed its a small inexpensive part runs about 15 dollars easy to replace.

Jan 17, 2010 | 2000 Oldsmobile Silhouette

1 Answer

My chevy ac blows only on fan speed 5 what could it be

It is a 99% chance you need a new fan speed resistor board.
It is beside the fan motor.... it sits in the heater/AC duct work to use the air flow to cool itself.
It costs about $35 and takes 15 mins to change.
Did you loose one speed then another and now only high works?
That's the usual way they fail.

Sep 18, 2009 | 1995 GMC Suburban

1 Answer

Heater blowes cold air replaced heater controls and all vales are working the heater core gets hot on both sides so how do i fix this

It seems to me if your heater core is hot, and the fan blows cold air, then your ducting is closed off. Try and see if your duct door is opening up. You say you changed out your controls, but it sounds as though it wasn't your controls that were bad, but what they control is not opening up.
It's all well and good that the heater core is getting hot, but if the fan cannot deliver that hot air passing through it, then walah.
It has to be an air duct obstruction. Either the ducting is collapsed, the duct door is not opening, or you have some obstruction blocking the ducting. My guess, because that is all I can give you without seeing for myself, is that the linkeage or solonoid that opens the duct door is not working. Older cars had a cable, but I believe newer use a solonoid to operate the opening and closing of the door. The door is there so you don't get the heat from the core when you are using AC.
Hope this helps.

Sep 11, 2009 | Dodge Pickup Cars & Trucks

3 Answers


you most likely have a bad airmix servo. this happens alot on these. they are expensive to replace too.

Sep 10, 2009 | 2001 Lexus RX 300

1 Answer

Air comes out of glove box

Get a strong torch lay on your back and look up into the area where the front air vent comes into your car

The main air duct has come away from the inlet and is allowing the cold air to enter the car while starving the heater and fans of the normal air flow

Did someone do a repair to the heater matrix or the loom recently.

You may have to take out the glove box to see where the pipes should be joined to

Jun 04, 2009 | 2003 Ford Explorer

1 Answer

2003 suburban rear air works fine but won't blow heat.

This problem is caused by what is called the air temp control blend door, either the door is sticking in the duct or the electric actuator that moves it is defective, the actuator is the common part that fails, the bad news is the dash assembly must be removed to replace the parts.

Feb 11, 2009 | 1999 Chevrolet Suburban

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