E10 — External probe fault

What does E10 mean?

The boiler's external temperature probe is reporting an issue. This probe helps the boiler regulate heating based on outside conditions.

• Faulty external temperature sensor.
• Loose or damaged wiring to the external probe.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the boiler, wait 30 seconds, then turn it back on.

2. 2

   Check if the error code clears.

3. 3

   If the problem persists, a qualified technician should check the external temperature sensor and its connections.