High
Boiler Shutdown on Ariston Micro Combi 27 MFFI

Your boiler has detected an internal safety issue and has shut itself down to prevent any damage or danger, meaning you currently have no heating or hot water.

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

Internal P.C.B. protections activated. Possible causes: air pressure switch fault, jammed reset button, or flame detection electrode failure.

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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