10 — External probe sensor faulty

What does 10 mean?

The external temperature sensor, which helps the boiler regulate heating based on outdoor conditions, is not working correctly. This can affect heating performance.

• Faulty external probe sensor
• Damaged or disconnected sensor wiring

Click steps to track your progress.

1. 1

   Press and hold down the Reset button for 2 seconds to try clearing the fault.

2. 2

   Check for any visible damage to the external sensor or its wiring (if safely accessible).

3. 3

   If the fault persists, contact an Authorised Service Centre to check or replace the sensor.