The cab fan (M3) is mechanically blocked and cannot rotate.
â–¶ How to fix
Check the cab fan.
What you'll see
No driver-visible symptom recorded.
System reaction
The cab fan will not rotate.
Diagnostic depth
Detection
The digital feedback signal from the cab fan to the climate control system (E17) is indicating that the fan is mechanically blocked. The test is performed when the cab fan is running and the starter motor (M1) is not running.
Possible cause
Something is preventing the cab fan (M3) from rotating freely.