BoilerFaultCodesRemeha C2 Fault Code
The Remeha C2 fault code means: your boiler is currently attempting to start up and light the flame to provide heating or hot water.. It appears on 2 Remeha models in our database.
Technical description: Boiler is igniting
What causes the Remeha C2 fault?
This code appears when the boiler is actively trying to light the gas to begin heating your home or water. It is a normal part of the start-up sequence and does not indicate a mechanical failure. If the code stays on the screen without the boiler firing up, it may be struggling to sense the flame or receive enough gas.
DIY fix possible
Wait a few moments for the boiler to complete the ignition sequenceCheck if the display changes to a temperature reading or a different status codeEnsure your gas supply is active if the code persists without the boiler firing up
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Gas Safe Register →Remeha models that show the C2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha C2 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026