this happend to me several times before, but it has always self corrected. on friday my ac/heater got stuck on defrost position, as usuall i let it be figuring it would fix itself, but to no avail. i took it to my dealer friend and he put his starscan on it and it showed nothing wrong. he was able to move the servos on the vent selector but he could not test the control **** itself.(dealership got mad so i had to leave) when i put it to max ac it goes to high speed. all the fan speeds work and the temp control works as well. do i get a big hammer or does someone have an idea? thanks for the help.

 

i dont know why, but yet again it fixed itself this morning when i left for work. Weird.