Select a fault code

The boiler has failed to detect gas or failed to ignite.

Flame established but extinguished during operation.

The boiler fan is not operating at the correct speed.

The flow temperature sensor has developed a fault.

The return temperature sensor has failed or reads outside range.

The domestic hot water temperature sensor has failed.

Flue gas thermostat has detected an abnormal temperature in the flue.

System water pressure has dropped below the safe minimum.

The boiler has overheated and the high limit thermostat has tripped.

The boiler has fired with insufficient water flow, triggering the dry fire protection.