Select a fault code

Fan not operating correctly.

The boiler has overheated. The safety thermostat has cut it out.

Water pressure has dropped below the minimum operating level.

The pump is not circulating water correctly.

Air pressure switch has not confirmed correct fan operation.

The boiler has failed to ignite after multiple attempts.

Fan or flue fault detected — combustion gases cannot be safely expelled.

Gas pressure is insufficient.

Ignition has failed.

Safety overheat device has tripped.

NTC thermistor has failed or is reading incorrectly.

Flame detected when burner should be off.

Flame went out during operation.

Gas valve fault detected.