Error Code 41 — ‘Toci’ temperature sensor malfunction

What does 41 mean?

This code indicates an electrical failure of the 'Toci' sensor. This sensor is important for ensuring there is no drop in hot gas temperature through the 4-way valve.

• Defective 'Toci' sensor
• Loose or damaged sensor wiring
• Open or shorted sensor circuit

Click steps to track your progress.

1. 1

   Check that the sensor wiring is firmly and correctly connected to the PCB via two wires at Plug CN-7.

2. 2

   Inspect the sensor wiring for any damage.

3. 3

   Test the sensor's resistance against the values in the manual's reference section.

4. 4

   Replace the sensor if it is found to be faulty.