High mileage 2005 Suburban z71 drivers side blows hot while AC ran from all the rest of the vents. I carefully followed these actuator reset instructions from Falcon on youtube ( ). The reset seemed to go as it should, but when I restarted it the passenger side had begun blowing hot, while the driver's side now seemed lukewarm (on their coldest settings). Does this seem to indicate the air door actuator has failed? If so, is there any way that I can narrow down which one needs replacing or cleaned? Any help is greatly appreciated and if I can gather more information please let me know. I hope to find the parts on Rockauto and take care of the problem myself. Thanks!

 

I purchased a new Dorman actuator for my 2005 Yukon, and reinstalled back into vehicle. You will want to make sure the door is positioned the same as the actuator arrives by rotating the arm in the vehicle to line up, NOT THE ACTUATOR. DON'T ADJUST ACTUATOR ITSELF, LEAVE THE WAY YOU PURCHASED. Mine was set in the middle. http://i263.photobucket.com/albums/i...0/DSC02402.jpg

If you buy a new actuator, you need to make sure the part numbers match because they make many different styles of these actuators for different vehicles and climate controls. Mine may differ from yours so don't base my part number on what you need to buy.

Now here is the tricky part that I had to research. Thanks to a site called Sparky's Answers, I was able to figure this all out and pass it onto everyone here. Now supposedly if you have a scan tool you can adjust and calibrate the actuator thru the scan tool. Since I don't, he also gave information on how to calibrate without a scan tool. So here ya go. First once you get actuator, new or used, make sure it can not move (I mean the metal know shouldn't be able to move by hand and differently don't move with pliers), if so, it is probably bad, if not go ahead and install the way it comes, and reconnect wiring. Then you will disconnect the battery for at least 30 seconds. Then reconnect battery, turn the ignition to the ON position for at least 1 minute, but he suggested 3-4 minutes so that's what I did, and DO NOT TOUCH THE A/C CONTROLS!!! You will then turn ignition to the OFF position for at least 10 seconds, then start the engine and confirm the new actuator is working correctly by turning the climate **** from cold to hot. If all was done correctly it will work!! I checked the actuator by being on the passenger side, turning ignition on, moving climate ****, and sticking my head under dash to watch for the actuator to move.