Select a fault code
The boiler has failed to ignite after multiple attempts.
The boiler lit but the flame extinguished unexpectedly during operation.
The combustion fan is not running at the required speed for safe operation.
The boiler has overheated and the high limit thermostat has cut out.
Flue gas thermostat has detected abnormal flue temperature.
System water pressure is below the minimum level required for safe operation.
The flow temperature NTC sensor has failed or is reading outside expected range.
Return temperature NTC sensor fault.
The circulation pump is not running or is operating at incorrect speed.
Gas valve not operating correctly.
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