BoilerFaultCodesWarmhaus rE41 Fault Code
Also written as RE41 — same fault.
The Warmhaus rE41 fault code means: your boiler is attempting to light but cannot maintain a flame, meaning it has safely shut down to prevent issues.. It appears on 1 Warmhaus model in our database.
Technical description: Flame loss after 6 successive ignitions – gas supply line valve being open.
What causes the Warmhaus rE41 fault?
This fault occurs when the boiler successfully lights but the internal sensors fail to detect a steady flame, causing the system to shut down for safety. The most common reasons are a buildup of carbon on the sensing probes, a blockage in the flue, or an unstable gas supply that prevents the burner from staying lit.
This fault is more common during the first cold snap of winter, as increased demand can highlight underlying issues with the gas valve or moisture buildup in the sensing electrodes.
DIY fix possible
Check that your gas emergency control valve is in the 'on' positionIf you have a pre-payment meter, ensure you have sufficient creditCheck if other gas appliances in your home, like a hob, are working correctlyPress and hold the 'R' (Reset) button for 3 seconds
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Gas Safe Register →Warmhaus models that show the rE41 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmhaus rE41 fault code information on this page is sourced and cross-checked against the official Warmhaus service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026