BoilerFaultCodesWhat the manual says
Manufacturer manualIgnition, pilot or flame proving fault.
Shared across the Fuelsaver Complheat 40 55 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 fault occurs when the boiler's internal safety system fails to detect a steady flame after several attempts to light. The most common reasons are a blocked pilot light burner or a worn-out sensor that can no longer tell the control board that the gas has successfully ignited.
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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Related fault codes
All 7 fault codes on the Fuelsaver Complheat 40 55
Seeing a different code? Every code this model can display, in one place.