BoilerFaultCodesSime Dewy 30/50 HE WM Fault codes & diagnostics
0 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 2004-2014 Discontinued
GC Number 47-719-23
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Status & diagnostic codes 20 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
20 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
0 bar Diagnostic Your boiler has lost the water pressure required to function, which is preventing it from heating your home or water. 1 bar Diagnostic Your boiler pressure is too low, which prevents it from heating the water properly. 3 bar Diagnostic Your boiler's internal water pressure is too high, which can cause it to leak or shut down to protect itself from damage. 51 Diagnostic Your boiler has identified a configuration setting that is limiting how hot it allows the water to get while in standby mode. 52 Diagnostic Your boiler is struggling to recognize the current outdoor or ambient temperature, meaning it cannot automatically decide whether to provide heating or just hot water. 53 Diagnostic Your boiler has disabled its automatic energy-saving features, meaning it will now run at a fixed temperature rather than adjusting itself based on the temperature inside your home. 54 Diagnostic Your boiler is struggling to accurately measure the air temperature around it, which may prevent it from heating your home correctly. 55 Diagnostic Your boiler has detected that the water inside the system has become too hot and has automatically shut itself down to prevent damage. 56 Diagnostic Your boiler is temporarily slowing down its heating process because the internal water temperature is rising faster than the system expects. 57 Diagnostic Your boiler is currently recalibrating its internal settings to ensure it burns gas efficiently. 58 Diagnostic Your boiler is currently recalibrating its internal timer to ensure it warms up your home efficiently and is not indicating a system failure. 59 Diagnostic Your boiler has detected that the temperature is rising too quickly or unevenly, suggesting a potential circulation issue within your heating system. 60 Diagnostic Your boiler is currently displaying a setting related to its internal timer rather than a functional breakdown, meaning it is simply indicating its current off-time configuration. 61 Diagnostic Your boiler is struggling to maintain the correct temperature for your hot water, so it has automatically limited the output to ensure the system keeps running safely. 62 Diagnostic Your boiler is struggling to detect or heat the water for your taps and shower, which has caused it to pause operation. 63 Diagnostic Your boiler is currently in a special viewing mode that lets you see its settings without changing them, rather than indicating an actual mechanical fault. 64 Diagnostic Your boiler has detected an error with an external connection or signal, likely from a thermostat, timer, or smart controller, which is preventing it from firing up correctly. 65 Diagnostic Your boiler is receiving a signal from an external device, such as a weather sensor or remote thermostat, which is currently preventing it from firing normally. 66 Diagnostic Your boiler is receiving conflicting or faulty signals from an outdoor temperature sensor, which may cause your heating to run less efficiently or turn off unexpectedly. 69 Diagnostic Your boiler is temporarily running a high-temperature cycle to ensure the water in your tank remains hygienic, and you do not need to take any action.