BoilerFaultCodesWhat the manual says
Manufacturer manualburner on (NORMAL OPERATING STATE FOR PRE-HEAT MODE)
Shared across the Ultracom range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
What causes this fault?
This code appears because your boiler is functioning exactly as it should and the burner is currently firing to provide heat. It is simply a status update letting you know that gas is being burned to heat the water for your taps or radiators. You do not need to take any action, as this is a sign of normal operation.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
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Related fault codes
All 41 fault codes on the Ultracom 24cx 30cx
Seeing a different code? Every code this model can display, in one place.