BoilerFaultCodesWhat the manual says
Manufacturer manualCombustion fault - Boiler operating in reduced output mode. A low supply pressure is detected on the gas line. As a result the appliance output is limited and the error code is displayed
Shared across the Alpha Intec² 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.
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 61 fault codes on the Intec 50CS
Seeing a different code? Every code this model can display, in one place.