Massey Ferguson 10.01.14 – AIRCON: Air Vent Circulation Flap Position Sensor Voltage Issue

The signal voltage from the potentiometer/sensor that monitors the position of the air recirculation flap actuator is outside of its expected operating range. This means the controller cannot determine whether the fresh air / recirculation flap is open, closed, or stuck, which can compromise cab climate control and pressurization.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• MF 6700 S
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 8600 series

1. 1

   Inspect the wiring harness connecting the AIRCON module to the circulation flap actuator for chafed wires, broken connections, or rodent damage

2. 2

   Use a multi-meter to verify that the proper reference voltage (usually 5V) is reaching the sensor and that the ground circuit is intact

3. 3

   Access the HVAC box and manually check the recirculation flap for mechanical binding caused by debris or a clogged cabin air filter

4. 4

   Connect the AGCO Electronic Diagnostic Tool (EDT) via the CANUSB adapter to monitor live voltage data from the flap position sensor while commanding the flap to move

1. 1

   Power Down

   Turn off the tractor and disconnect the battery isolator switch to prevent electrical shorts.

2. 2

   Access the HVAC Unit

   Depending on the tractor model, the HVAC unit is typically located in the cab roof. Remove the inner roof liner/headliner or the external roof cap to access the blower and actuator assemblies.

3. 3

   Locate the Actuator

   Identify the recirculation flap actuator (a small electric motor with an integrated potentiometer) mounted on the side of the air intake housing.

4. 4

   Remove the Actuator

   Disconnect the electrical pigtail. Remove the mounting screws holding the actuator to the HVAC housing and detach it from the flap linkage.

5. 5

   Install the New Part

   Align the new actuator with the flap linkage. Secure it with the mounting screws and reconnect the electrical harness.

6. 6

   Reassemble and Calibrate

   Reinstall the cab roof/liner. Reconnect the battery. Turn the ignition on and use the AGCO EDT (or the tractor's dashboard diagnostic menu) to clear the 10.01.14 fault code. Run the HVAC system through all modes to ensure the flap cycles fully and the module learns the new end-stops.