Select a fault code

The boiler has failed to establish a flame after multiple ignition attempts.

The boiler established a flame but it extinguished unexpectedly during operation.

The safety thermostat has tripped due to excessive boiler temperature.

The high limit thermostat has activated, indicating the boiler has overheated.

The flue gas thermostat has detected an abnormal flue temperature.

System water pressure has dropped below the minimum required level.

The combustion fan is not operating at the correct speed.

Flow temperature sensor has failed or is reading outside range.

Return temperature sensor fault.

The boiler cannot detect adequate water flow through the heat exchanger.