Identify your appliance
Models and ranges Sime Selected references from manufacturer documentation, including older generations. Check the full name and suffix on the rating plate: manuals and error codes can differ by version and country.
Boiler display
Sime error codes Check the model, note the full code and learn the useful precautions before the diagnosis.
Before reading the list Verified selection for Sime GO BF, 6331206 R4. Codes are not universal: confirm the model and generation in the exact manual.
Official manufacturer sources 12 error codes found
E01 Flame detection circuit fault The burner failed to light or the flame was not detected: interrupted gas supply, worn ignition or sensing electrode, gas valve or condensate drain. CautionView details E02 Safety thermostat tripped A temperature safety has tripped: the water is not circulating enough (air, pump, closed valves, dirty filter or heat exchanger) or the circuit is short of water. CautionView details E04 Insufficient system pressure The water pressure in the heating circuit is too low, often because of a small leak, recent radiator bleeding or a slow loss over the months. CautionView details E05 Air pressure switch tripped Condensate or flue gas removal is disturbed: a blocked or frozen condensate pipe, condensate pump, flap or flue duct obstructed. CautionView details E06 Hot-water sensor fault A temperature sensor is sending an impossible value: a faulty sensor, or a loose or short-circuited cable or connector. CautionView details E07 Flow sensor fault A temperature sensor is sending an impossible value: a faulty sensor, or a loose or short-circuited cable or connector. CautionView details E09 No water circulation Water circulation is insufficient or detected as abnormal: air in the circuit, a blocked or weak pump, closed valves or a dirty circuit. CautionView details E11 Unwanted flame signal The appliance detects a flame when the burner should be off, or after the gas has closed. The gas valve or the sensing circuit may be faulty. DangerView details E12 Gas valve modulator disconnected A control, communication or electronic memory fault has been detected: circuit board, controller, wiring or power supply. CautionView details E28 Maximum consecutive resets reached A control, communication or electronic memory fault has been detected: circuit board, controller, wiring or power supply. CautionView details E37 Insufficient mains voltage A control, communication or electronic memory fault has been detected: circuit board, controller, wiring or power supply. CautionView details E40 Incorrect mains frequency A control, communication or electronic memory fault has been detected: circuit board, controller, wiring or power supply. CautionView details See the Sime codes