Mix air actuator has too small or too large total travel angle.
â–¶ How to fix
Check that the air mix air/temp flap can move freely, if no fault is found, replace the mix air/temp motor. This unit is connected to the climate control system via a LIN-bus.
What you'll see
No driver-visible symptom recorded.
System reaction
The mix air flap will not function.
Diagnostic depth
Detection
The climate control system (E138) has detected the actuator reports an error.
Possible cause
There may be an internal error in the actuator or an error in the flap linkage.