Fendt 10.1.31 – Overall system/tractor: M015 - Servomotor, top air valve non-operable

The servomotor controlling the top/middle air distribution flap in the cab's HVAC system is non-operable, preventing the operator from controlling the direction of the airflow to the upper cab vents.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 300 Vario (including COM III)
• Fendt 400 Vario (including COM III)
• Fendt 700 Vario (including COM III and SCR)
• Fendt 800 Vario (including COM III and S4)
• Fendt 900 Vario (including COM III and S4)
• Fendt 1000 Vario

1. 1

   Test the internal motor resistance of the disconnected M015 actuator using a multimeter (specification is approximately 47.2 ohms).

2. 2

   Inspect the wiring harness and connectors leading to the M015 servomotor for chafing, corrosion, or loose pins.

3. 3

   Check the physical air flap/door inside the HVAC box for mechanical binding caused by debris or warped plastic.

1. 1

   Access the HVAC Unit

   Remove the necessary cab roof panels or headliner trim to access the ventilation assembly.

2. 2

   Locate M015

   Identify the M015 servomotor, which is mounted on the exterior of the air box controlling the top/middle air flap linkage.

3. 3

   Disconnect and Remove

   Unplug the electrical connector from the actuator. Remove the retaining screws holding the actuator to the HVAC housing.

4. 4

   Verify Flap Movement

   Before installing the new part, manually turn the air flap shaft by hand to ensure it moves smoothly without binding.

5. 5

   Install New Actuator

   Align the new servomotor with the flap linkage/shaft and secure it with the mounting screws.

6. 6

   Reassembly and Clearing Codes

   Reconnect the electrical harness. Reinstall the cab roof/headliner panels. Turn on the tractor ignition, navigate to the fault memory in the Vario terminal, and clear the stored 10.1.31 code. Test the HVAC system to ensure air properly diverts to the top vents.