Fendt 10.1.3B – A053 - ECU, air conditioning control: A053 - ECU, air conditioning control

Overheating protection or anti-blocking mechanism faulty. The system has detected that the HVAC blower motor is either physically jammed or drawing excessive electrical current. It can also be related to a fault in the evaporator temperature sensor.

• 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 (COM III, SCR)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III, SCR)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III, SCR)

1. 1

   Inspect the HVAC blower motor fan for physical blockages, such as heavy dust, dirt, or debris that could cause the fan to bind and trigger the anti-blocking mechanism

2. 2

   Test the blower motor's resistance and power supply to check for excessive current draw triggering overheating protection

3. 3

   Check the evaporator temperature sensor and its wiring harness for shorts or breaks

4. 4

   Inspect the wiring harness and connectors between the A038 Central electrical system ECU and the A053 Air conditioning control unit for corrosion or loose pins

1. 1

   Power Down

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

2. 2

   Access the HVAC Unit

   Remove the cab roof paneling to access the main air conditioning unit (A053) and blower assembly.

3. 3

   Clear Debris

   If the blower wheel is jammed by debris, clean the housing thoroughly and verify that the fan spins freely by hand.

4. 4

   Replace Faulty Components

   If the motor is seized or fails the resistance test, unbolt the blower motor assembly, disconnect the 4-pin connector, and install a new OEM blower motor. If the evaporator temperature sensor is faulty, replace it.

5. 5

   Reassemble and Clear Codes

   Reconnect the battery, turn on the ignition, and use the Fendt terminal (or FENDIAS diagnostic software) to clear the 10.1.3B fault code.

6. 6

   Test Operation

   Run the air conditioning system through various fan speeds to ensure the overheating/anti-blocking protection does not trip again.