Select a fault code
The boiler has failed to ignite. Low gas pressure, a faulty electrode, or a blocked condensate pipe are common causes.
The flame went out during normal operation.
The boiler has overheated. Causes include poor circulation, a blocked heat exchanger, or a failing pump.
The flow temperature sensor has failed.
The return temperature sensor has failed.
The fan is not running at the required speed for safe combustion.
The air pressure switch has not confirmed fan operation.
A fault has been detected on the gas valve.
Flame detected when burner should be off.
System water pressure has dropped below the minimum level.
Internal fault on the main circuit board.
The pump is not operating correctly.
The condensate drain is blocked or frozen.
The hot water temperature sensor has failed.
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