F.71 - Flow NTC sensor signalling constant value

What does F.71 mean?

The flow temperature sensor (NTC) is signaling a constant temperature value, indicating it is either incorrectly positioned or defective.

• The flow temperature sensor is incorrectly positioned at the supply pipe.
• The flow temperature sensor is defective.

Click steps to track your progress.

1. 1

   Press the reset button on the boiler display up to three times to try and clear the fault.

2. 2

   Contact customer service. This indicates the flow temperature sensor is sending a constant value, suggesting it's either misplaced or defective.

3. 3

   A qualified technician will need to check the sensor's position and function.