Main Boiler Fault Codes

Your boiler has lost its electrical connection to the gas supply unit, meaning it cannot ignite to provide heating or hot water.

Your boiler has detected an internal issue with the gas control system and has shut down as a safety precaution.

Your boiler has detected a fault with the internal sensor that monitors the temperature of your central heating water, causing the system to stop working as a safety precaution.

Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down for safety.

Your boiler has detected a problem with the sensor that monitors the temperature of the water returning from your radiators.