Select a fault code
The boiler has overheated and locked out. The safety thermostat has activated. Causes include poor circulation or a blocked heat exchanger.
The system pressure has dropped too low for safe operation.
The pump has failed or is not circulating correctly.
The air pressure switch has not confirmed correct fan operation.
The boiler has failed to ignite after the maximum number of attempts.
The fan or flue system has a fault. Combustion gases cannot be safely expelled.
Gas pressure at the boiler is insufficient.
The thermal safety device has operated.
A temperature sensor has failed or is reading incorrectly.
Flame detected when burner should be off. Serious fault.
The flame went out during operation.
A fault has been detected on the gas valve.
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