High
Pump not running on Ariston Micro Combi 27 MFFI

Your boiler is failing to circulate water because the internal pump has seized or stopped working, meaning you will 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

Check system pressure, pump cable, P.C.B., or check if the pump is stuck.

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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