High
10 on Ariston E-Combi One

Your boiler is failing to light because it cannot detect a flame, which means your heating and hot water have stopped working.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Check of the gas safety systems: -safety device for lack of gas or flame (detection electrode); -safety device for gas cock.

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

501View →504View →

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