DTC 9

DTC 9: A Problem in the Air Mix Control Linkage, Door, or Motor

1. Test the air mix control motor.

Is the air mix control motor OK?

YES - Substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.

NO - Go to step 2.

2. Remove the air mix control motor.
3. Check the air mix control linkage and door for smooth movement.

Do the air mix control linkage and door move smoothly?

YES - Replace the air mix control motor.

NO - Repair the air mix control linkage or door.