Select a fault code
The boiler has failed to ignite. Common causes include low gas pressure, a dirty or damaged ignition electrode, or a blocked condensate pipe in cold weather.
The flame went out unexpectedly during operation.
The boiler has overheated and the safety thermostat has cut it out.
The flow temperature sensor has failed or is reading incorrectly.
The return temperature sensor has failed.
The fan is not running at the correct speed.
A fault has been detected on the gas valve.
Flame detected when burner should be off. Serious fault.
System pressure has dropped below the minimum operating level.
Internal fault on the main circuit board.
The pump is not operating correctly.
Condensate drain is blocked or frozen.
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