F71 Fault — Flow temperature sensor constant value

What does F71 mean?

The flow temperature sensor is signaling a constant value, which is usually incorrect and indicates a problem with the sensor or its positioning.

• Flow temperature sensor incorrectly positioned at supply pipe
• Flow temperature sensor defective
• Harness continuity issue

Click steps to track your progress.

1. 1

   Check that the flow temperature sensor is correctly positioned at the supply pipe.

2. 2

   Check the resistance of the flow thermistor (temperature sensor) (requires specialist tools).

3. 3

   Check the continuity of the wiring harness connected to the flow sensor (requires specialist tools).