Ravenheat CS 80/90, WH System, WH 80/90 Fault Codes

CombiSystem Natural GasLPG 23.4-26.4 kW 2000-2010 Discontinued

Replaced by: CSI 120

All 21 fault codes

Code	Severity	Plain English	DIY
E02	High	Your boiler has stopped working because water is not moving through the system properly, which is causing it to overheat and shut down for safety.	Yes
E03	High	Your boiler has detected an issue with the sensor that monitors water movement, preventing the system from heating up properly.	Engineer
E04	Medium	Your boiler has detected a problem with the sensor that monitors hot water temperature, meaning you will likely have no hot water or inconsistent temperatures.	Engineer
E05	High	Your boiler has detected an issue with the fan that clears exhaust gases, preventing the system from starting for safety reasons.	Engineer
E06	High	Your boiler has detected that the water temperature in your heating system is getting too high, causing it to shut down for safety.	Yes
E08	High	Your boiler has detected that there is not enough water in the system to operate safely and has shut down to prevent damage.	Yes
E09	High	Your boiler has shut down because it has detected its internal temperature is getting too hot, usually caused by a blockage or a pump failure.	Yes
E10	Emergency	Your boiler has too much water in the system, which puts extra stress on the internal components.	Yes
E13	High	Your boiler's internal computer has encountered a glitch or a configuration error and cannot communicate properly with the system.	Yes
E21	High	Your boiler has detected that the water returning from your radiators is too hot, causing the system to shut down to prevent damage.	Yes
E22	High	Your boiler has sensed that the exhaust gases are becoming too hot and has shut down as a safety precaution.	Engineer
E23	High	Your boiler has detected a fault with the sensor that monitors exhaust gases, and as a safety precaution, it will not operate until this is fixed.	Engineer
E24	High	Your boiler has detected a problem with the sensor that monitors the water temperature returning from your radiators, preventing the system from operating correctly.	Engineer
E25	High	Your boiler has detected that the water inside the main heating unit has frozen due to extremely cold temperatures, preventing it from operating.	Yes
E29	High	Your boiler has detected that the water used for your taps and showers is getting too hot, causing the system to shut down for safety.	Engineer
E31	High	Your boiler has lost its digital connection with your external smart thermostat or heating controls, meaning it cannot receive instructions to turn on.	Yes
E41	High	Your boiler has sensed an unusual temperature difference between the water leaving it and the water returning, suggesting that water is not circulating through your heating system correctly.	Yes
E42	High	Your boiler has detected that heat is not moving through the system correctly, usually meaning the water is hotter in one part of the machine than another.	Engineer
E43	High	Your boiler has detected an unusual temperature difference between internal parts, suggesting that water is not circulating correctly through the system.	Yes
E44	High	Your boiler has detected an unusual temperature difference between internal sensors, suggesting a possible circulation issue or a faulty component.	Engineer
E46	High	Your boiler is having trouble monitoring its internal water pressure, which has caused it to stop working for safety.	Engineer

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