Select a fault code

The fan is not reaching the required speed for safe operation.

A fault with the gas valve relay on the PCB.

The condensate pipe is blocked or frozen, causing the boiler to shut down.

Flow temperature sensor has failed or is out of range.

Boiler has overheated and the high limit stat has tripped.

Safety temperature limiter has cut out due to extreme overheating.

Boiler has failed to ignite.

A general internal electronics fault has been detected.

System pressure is too low for safe operation.

Flame detected without ignition demand.