Reread the owner's manual on this to be sure you have not set something to
bypass this control.
Then try removing the fuse for the AC control (should say which fuse's) in
owner's manual), wait about 10 minutes, then reinstall fuse, turn on
ignition (don't start), wait 1 minute. DO NOT touch any buttons during this
The above "reboots" some HVAC systems and that may reset everything to
If that does not work, you would need a factory service manual set of books
(order from helminc.com)and a multimeter to troubleshoot the problem.
How to use a multimeter...
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.