Question about 2005 GMC Sierra
Have dual temp control but when the a/c is cut on one side( driver's) blows hot air the other side blows cold
It is your actuators going bad. need to replace the one for the side giving you problems
Posted on Sep 22, 2008
SOURCE: Dual Temp on 2000 Dodge Caravan
Sounds like a "mode" door issue. Either the door is broken or the motor that operates it is faulty. There are very few wiring issues with these motors, so I'd guess the door motor. Unfortunatly, the door is located inside the heaterbox and is not accessable without dash and heaterbox removal. This is a job for a qualified technician as the a/c system must be drained first. If the problem is a motor, then some are accessable by removing the panels aound the heaterbox. Listen for the door movements while operating in a quiet setting. You should be able to hear the door move if the motor is operating. Listen close, it's quiet.
Hope this helps, let me know if I can do more.
Posted on Feb 20, 2009
You have dual zones that are controlled by temperature actuators the passenger side has lost its memory or has gone bad you can put it in self programming by disconnecting the battery for ten minutes then hook it back up start the truck turn the temperature control on but do not touch any other controls let it go thru the self programming for about 6 to 7 minutes then select your temperature you want if it still does not work properly you may have a bad actuator or a bad connection at the actuator
Posted on Jun 03, 2009
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