F.471 - No call for heat due to lead break or short circuit

What does F.471 mean?

The boiler is not receiving a call for heat, indicating a problem with a sensor or its connection. This is often caused by a broken wire or a short circuit in the system.

• Lead break or short circuit
• Problem with system plug dD
• Faulty lead or plug-in connection

Click steps to track your progress.

1. 1

   Check the system connection (plug dD) for secure attachment.

2. 2

   Inspect the lead and its plug-in connection for any damage or looseness.

3. 3

   A qualified technician should measure the supply voltage to the sensor to see if it is 5V–.

4. 4

   Reset the boiler by turning it off and on again.