Fault E8 (Detailed 189) — Burner fault: ionization current outside permissible range

What does E8 mean?

The burner is in fault mode because the ionization current is outside the acceptable operating range. This could indicate issues with the gas supply, the gas type, or the ionization electrode itself.

• The ionization current lies outside the permissible range

Click steps to track your progress.

1. 1

   Check your gas supply, including gas pressure and the gas flow limiter, and inspect the gas train and connecting lead.

2. 2

   Verify the correct allocation of gas type (natural gas or LP gas) for your boiler.

3. 3

   Inspect the ionization electrode: check its distance to the burner gauze assembly and look for contamination.

4. 4

   Press the reset button R on your boiler.