High
51 on Alpha Evoke 10 / 18

Your boiler is having trouble talking to its remote control or thermostat, meaning it isn't receiving the instructions to turn your heating on or off.

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

Error between communication of the Climatic transmitter and boiler receiver

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

E51View →

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