BoilerFaultCodesWhat the manual says
Manufacturer manualThe boiler checks that the burner has lit, if the boiler does not sense that the burner has lit, the error code E04 will appear on the display, should this error occur, the boiler will attempt to relight two more times (20 seconds between each attempt).
From this model's manual
Verified against the Chaffoteaux Minima He installation & service manual, page 51.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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