Question about Buick Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: 2003 buick lesabre AC problem
You have to find the motor that controls the blend door and open it manually to find out which one is bad there are 3 blend doors on the HV/AC system one will be where the heater core is. The other will be between the vented air and AC? heating system then the third door will operate vents in dash and defrost condition. If you have someone operate them AC system heating system and watch the blend door motors, the one you find not moving will be the one that has the problem. They have vacuum and electrical motors, if it is a acuum motor you can move the door manually with your hand, if it's electric you will have to disconnect the rod by removing the pinch clip off of the rod.
Posted on Jul 10, 2009
the vents are run on vacuum so if you get the others just not vent sounds to me like you need to find your junction and see if all the hoses are hooked up. mine was passenger side above where ur feet go. All that usually happens is a hose came off and u need to put it back on sometimes they break but u will be able to see once u find it.
Posted on Jun 07, 2010
SOURCE: heater not working in my
This sounds like the blend door actuator. This is a little door in the vent box down under the passenger side dash that opens and closes to change the vent temperature from heat to a/c. It is a little motor that opens the door. It tends to stop working due to the elements that it is in. I hope this helps!!! Thanks!!!
Posted on Oct 06, 2010
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