E92 — Combustion test alarm during auto-setting

What does E92 mean?

The boiler's self-calibration process has triggered an alarm during the combustion test, indicating a problem with combustion.

• Flue gas recirculation (exhaust gases being drawn back into the combustion air intake).
• Issues with the gas supply or burner.
• Incorrect initial calibration.

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

   Ensure the boiler's flue terminal outside is clear of any obstructions and not too close to other air intakes.

3. 3

   A qualified technician should check for flue recirculation and perform a new calibration.