your mode actuator may be the problem try pulling HVAC fuse inside car for sixty seconds with key on. then reinstall it may reset it otherwise check to see if it gets power or not. it may be bad.
And I have a problem with window motor on the right side theirs power going to it all the it wont go down.
John Lavers
Jul 18, 2016 at 2:27 AM
MHPAUTOS
✓ASE Certified Mechanic
31,937 POSTS
The actuator shown in the earlier response is known for failing, you can unplug it and check for power at the plug when defrost is commanded.
Jul 23, 2016 at 2:22 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.