BoilerFaultCodes.com

Ariston Clas Net One, Clas One, E-Combi and E-System Fault Codes

CombiSystem Natural GasLPG 18-38 kW 2017-present
GC Numbers: 47-116-8347-116-8447-116-8547-116-8647-116-8747-116-8847-116-8947-116-9047-116-9147-116-9241-116-5641-116-5741-116-58

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Most common fault codes

701
A sensor that monitors water temperature for your main heating area has stopped working correctly, which may prevent your radiators from heating up.
Gas Safe engineer required · £90-160
711
Your boiler has lost its ability to accurately measure the temperature of the water coming back from your radiators, which may stop your heating from working efficiently or at all.
Gas Safe engineer required · £90-160
750
Your boiler has disabled the central heating because it has detected a configuration error or a communication failure with your thermostat and heating controls.
Gas Safe engineer required · £90-180

All 12 fault codes

Code Severity Plain English
411 Medium Your boiler has lost communication with the main thermostat or temperature sensor that controls your primary heating zone.
412 Medium Your boiler has lost communication with the temperature sensor that controls the second heating zone in your home.
414 Medium Your boiler has lost communication with the temperature sensor responsible for the third heating zone in your home, meaning that specific area may not heat correctly.
701 High A sensor that monitors water temperature for your main heating area has stopped working correctly, which may prevent your radiators from heating up.
702 Medium Your boiler has detected a fault with a temperature sensor serving a secondary heating area, meaning that specific zone may not heat up correctly.
703 Medium Your boiler is struggling to monitor the temperature for one of your heating zones, which may cause that specific area of your home to not heat correctly.
711 High Your boiler has lost its ability to accurately measure the temperature of the water coming back from your radiators, which may stop your heating from working efficiently or at all.
712 Medium Your boiler has detected a fault with a temperature sensor in part of your heating circuit, which likely means some radiators are not warming up as they should.
713 Medium Your boiler has detected a faulty temperature sensor in the third heating zone, meaning it cannot accurately monitor the water returning from that specific part of your home.
722 Medium One of your secondary heating zones has reached a temperature that is too high, causing the system to stop as a safety precaution.
723 Medium Your boiler has detected that the water in the third heating zone is becoming too hot, causing the system to shut down that specific area to prevent damage.
750 High Your boiler has disabled the central heating because it has detected a configuration error or a communication failure with your thermostat and heating controls.

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