Code 357 - Flow or return temperature rising too quickly

What does 357 mean?

The temperature measured by either the flow temperature sensor or the return temperature sensor is rising too quickly. This indicates a problem with heat dissipation or circulation.

• Insufficient flow through the heating system
• Pump malfunction or incorrect wiring
• Defective temperature sensor

Click steps to track your progress.

1. 1

   Check whether there is sufficient flow through the heating system.

2. 2

   Check the performance and wiring of the heating pump and the associated sensors.

3. 3

   If necessary, replace the pump or the temperature sensor after professional diagnosis.