Question about 2003 Pontiac Montana

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This is on a 03 monatna vav the blend door actvator. Do you have to take the dash out ?

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No remove the panel in front of your knees, it will be connected to the side of the heater case use the new one to aid in finding the correct part once under the dash two screws and one plug are all you have to deal with

Posted on Oct 14, 2010

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My 03 h2 has no heat. I get cool air blowing out the vents. My defrost rear vents same thing. Then today all of a sudden,air stopped blowing thru the drv side but all other vents remained the same.


This is most likely due a failure of a part called the air temperature control blend door actuator motor and that is often caused by a sticking blend door that the motor drive operates that has become warped from the heat of the air on heat mode. The dash must come out to repair these parts.

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Why would cool air blow out the driver side and hot air blow out the passenger side on my 03 cadillac cts?


This is caused by a defective air temperature control blend door actuator motor or a jammed blend door or in most cases both..

Dec 28, 2016 | 2003 Cadillac CTS

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Where is the blend door actuator located on 03 Hummer h2. Driver side blows cold, passenger side blows hot


They are not vac on the h2. there is 2 for temp control, one for recirc and one for blend. check the hummer forum as there is a great read for it there. the driver side actuator is really ez as it's under the glovebox, 20 min fix. the rest take removing the whole dash but it's not that tough.

Jan 10, 2012 | 2003 Hummer H2

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2004 monte carlo blend door where is it located?


The blend door is under the dashboard where the air ducts are located for your AC.

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1 Answer

2000 FORD Expedition both heater hoses get warm. gets heat at first then turns cold front and back. I flushed the heater core and didnt get any gunk out. Is this the heatercore or is this the blend door


if the heater hoses are both hot its a blend door actuator, and possably the blend door its self, the way to make sure is to feel around under the dash . feel the black hvac box and if its feels warm then the heater core is good, you will have to remove the dash to replaced the bland door actuator and blend door ,i reccomend you replace both beacause its alot of work to remove the dash so make sure both components are replaced while you are in there

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You should have a blend door actuator. This can be bad or the door itself can be broken. It is most likely in the dash and not easily accessible.

May 18, 2010 | 2003 Buick Century

1 Answer

The heating and air works but doesn't blow hot or cold air there is a part under the dash board that is missing some kind of valve,could you please help me with this


There is a blend door that is know to give problems. Sometimes the blend door itself will break but there is also a blend door actuator that can fail. The blend door actuator is located behind the dash...kinda behind the temperature control knob and is a pretty easy fix if you're able to hang upside down under your dash for about 20 minutes. The actuator costs around $50.
I've never replaced the blend door itself, but have read up on it when I thought that might be the problem. Let's just say the part is cheaper but clear your weekend. I think step one of building a Taurus is the blend door....it's buried in there.
Hope this helps.

Oct 25, 2009 | 1997 Ford Taurus

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03 Buick Century DUal Climate problem


the problem is a part called the air temperature control blend door acuator motor, it is deep inside the dash and the dash must be removed to replace it.

Jul 09, 2009 | 2003 Buick Century

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01 silverado blend door changed /now works back wards!!!


most likely needs a LH (bottom) temp actuator. Located in the center of the dash on the bottom, you have to remove the hush panel on the rh side of the truck

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