Came across this forum while doing a search on air mix actuators. While not a Bonneville owner, I'm impressed with discussion. I own a 2001 Cadillac Deville. My problem is I'm getting heat & a/c ok, but the air flow is only coming out of the defrost vents. When I start the car there is a tick, tick, tick sound coming from inside the dash somewhere, that eventually stops. There is no blinking on the ECC, it seems fine. It'* just the air flow distribution is stuck. Is this the air mix actuator or something else?
Been looking for answers to this for a long time.
Any help is greatly appreciated!
Possibly. You might be able to remove it and then use some JB weld, that might work, it might not. If you want a new part, check out RockAuto Auto Parts They simply have some of the best prices you will ever find, they ship fast, and are very helpful.
Finally located a good thread at CadillacOwners.com a forum much like this one. Apparently knowing terminology is key. They call it a "mode door actuator" or "blend door actuator". The part is inexpensive, but labor is unbelievable. The dealer wants $600 because they have to remove the dash. According to the forum, it can be done without removing the dash, but it is difficult and time consuming. One guy in the forum describes in great detail what he went thru. At one point taking a saber saw to remove a section of duct in order to gain better access.
Sounds like this part failure is pretty common, though the fix is not easy.
At any rate, thanks for your help.