Select a fault code

Boiler attempted to light but no flame was detected. Gas or ignition fault.

Primary circuit temperature exceeded safe limit.

Central heating flow temperature sensor has failed.

Return pipe temperature sensor has failed.

Hot water temperature sensor fault.

Water pressure in system is too low.

Fan has not reached correct speed or has stopped.

Circulation pump has seized or is not running.

Gas valve relay or modulation fault.

Control board internal error detected.

Multiple ignition attempts failed — boiler locked out for safety.

Flame extinguished unexpectedly during operation.