Massey Ferguson 10.X.18 – AIRCON: Cab Temperature Sensor Fault (AIRCON) / Ambient temperature sensor fan fault

The cab's interior ambient temperature sensor features a small built-in aspirator fan that draws cabin air over a thermistor to get an accurate reading of the room temperature. This fault code indicates that the sensor's fan is not turning, causing the automatic climate control system to disable automatic regulation and default to manual control.

• 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
• 8600 Series (8650, 8660, 8670, 8680, 8690)
• 7600 Series (7614 through 7626)
• 7700 Series
• Dyna-4, Dyna-6, and Dyna-VT transmission models featuring the ATC (Automatic Temperature Control) cab

1. 1

   Locate the X69 Sensor: Depending on the model, the cab temperature sensor is typically located either below the operator's seat, mounted in the top right side of the fuse panel, or integrated into the cab pillar/roof.

2. 2

   Inspect the Wiring: Check the sensor connections and the wiring harness for physical damage, loose fitment, or corrosion.

3. 3

   Check for Blockages: Inspect the small slotted grille over the sensor to ensure dust or debris isn't physically jamming the tiny aspirator fan.

4. 4

   Clear and Retest: If a wiring issue is found and repaired, clear all fault codes and turn the key on to see if the fan resumes spinning and the code stays clear.

1. 1

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

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

2. 2

   Remove the interior trim panel covering the X69 cab temperature sensor.

   Remove the interior trim panel covering the X69 cab temperature sensor (location varies by series; check near the fuse panel or under the seat).

3. 3

   Disconnect the electrical harness connector from the sensor.

   Disconnect the electrical harness connector from the sensor.

4. 4

   Unclip or unscrew the faulty sensor from its mounting bracket.

   Unclip or unscrew the faulty sensor from its mounting bracket.

5. 5

   Install the new cab temperature sensor and secure it in place.

   Install the new cab temperature sensor and secure it in place.

6. 6

   Reconnect the wiring harness.

   Reconnect the wiring harness.

7. 7

   Reconnect the battery, turn the ignition on, and clear the ATC/AIRCON fault codes.

   Reconnect the battery, turn the ignition on, and clear the ATC/AIRCON fault codes.

8. 8

   Test the system by setting the climate control to 'Auto'.

   Test the system by setting the climate control to 'Auto' to verify that the AC and heater valves regulate the temperature automatically.