Sime
Sime Water Heaters Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Sime gas water heater does not ignite; display shows E01 shortly after a hot water tap is opened.
Ignition Failure / No Flame Detection
E02
Sime water heater locks out with E02; burner lights briefly then shuts down within a few seconds.
Flame Loss During Operation
E03
Sime water heater shows E03 and shuts down; fan may start but burner does not ignite.
Flue Gas Safety / Exhaust Fault
E04
Display shows E04 and the Sime water heater will not start; fan may not run.
Air Pressure Switch / Fan Failure
E05
Sime water heater shows E05; unit stops heating and may cycle on and off rapidly.
Flow Temperature Sensor Fault (NTC Open/Short)
E06
E06 appears on the Sime water heater display; water temperature is erratic or unit shuts down.
Inlet / Return Temperature Sensor Fault
E07
Sime water heater displays E07 and stops; may occur after long operation.
Overheat Thermostat Trip
E08
E08 error on Sime water heater; unit attempts to start but shuts down quickly.
Flow Switch / Flow Sensor Fault
E09
Sime water heater shows E09; unit will not ignite and may indicate gas-related fault.
Gas Valve / Gas Supply Fault
E10
E10 displayed; Sime water heater does not start and may indicate low water pressure or circulation fault.
Low System Water Pressure / Water Circuit Fault
E11
Sime water heater shows E11; fan may run continuously or not at all.
Fan Speed / Fan Feedback Fault
E12
E12 error on Sime water heater; unit may start but then shut down with temperature-related fault.
DHW Outlet Over-Temperature / Sensor Disagreement
E13
Sime water heater intermittently shows E13; unit may continue to operate with reduced performance.
Communication Error Between Control Board and User Interface
E14
E14 displayed; Sime water heater fails to modulate correctly, water temperature swings hot and cold.
Gas Modulation / Valve Control Fault
E15
Sime water heater shows E15; unit may lock out with an internal leak or condensate issue.
Internal Leak / Condensate Fault
E16
E16 error; Sime water heater indicates sensor short circuit or wiring fault.
NTC Sensor Short Circuit
E17
Sime water heater shows E17; may be associated with sensor open circuit.
NTC Sensor Open Circuit
E18
E18 error; Sime water heater may show low flow or blocked heat exchanger indication.
Heat Exchanger Flow Restriction
E19
Sime water heater intermittently shows E19; unit may reboot or freeze.
Internal Control Board Fault / Memory Error
E20
E20 displayed; Sime water heater indicates sensor mismatch or calibration error.
Temperature Sensor Calibration / Mismatch Fault
Symptom
Water heater display is completely dead; no lights or response.
No Power / Electrical Supply Failure
Symptom
Water heater display works but buttons or knobs do not respond to input.
User Interface Control Failure
Symptom
Water heater emits a burning smell or plastic smell during operation.
Overheating Component / Electrical Overload
Symptom
Water heater emits a whistling or high-pitched noise when hot water is running.
Flow-Induced Noise / Partial Blockage
Symptom
Water heater fan runs but burner does not light; no error code is displayed.
Ignition Sequence Interruption
Symptom
Water heater frequently cycles on and off rapidly while a tap is open.
Short Cycling / Flow Instability
Symptom
Water heater leaks water from the bottom of the casing.
Internal Water Leak
Symptom
Water heater lights but hot water is only lukewarm, never reaching the set temperature.
Insufficient Heating / Underfiring
Symptom
Water heater makes loud banging or popping noises during operation.
Kettling / Boiling in Heat Exchanger
Symptom
Water heater occasionally emits a small puff or pop at ignition.
Delayed Ignition
Symptom
Water heater output temperature fluctuates between very hot and cold during a single shower.
Temperature Fluctuation / Poor Modulation
Symptom
Water heater produces no hot water at all; display is on but burner never ignites and no error code is shown.
No Ignition Without Error Indication
Symptom
Water heater shows signs of corrosion or rust stains around connections and casing.
Corrosion / Long-Term Leakage
Symptom
Water heater trips the household circuit breaker or RCD when it starts.
Electrical Short / Earth Leakage
Symptom
Water heater vibrates excessively or rattles when the burner is on.
Mechanical Vibration / Loose Mounting
Symptom
Water heater’s flue terminal shows signs of condensation staining or water dripping externally.
Condensate Management / Flue Drainage Issue
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Sime gas water heater does not ignite; display shows E01 shortly after a hot water tap is opened.
|
Ignition Failure / No Flame Detection | View Details |
| E02 |
Sime water heater locks out with E02; burner lights briefly then shuts down within a few seconds.
|
Flame Loss During Operation | View Details |
| E03 |
Sime water heater shows E03 and shuts down; fan may start but burner does not ignite.
|
Flue Gas Safety / Exhaust Fault | View Details |
| E04 |
Display shows E04 and the Sime water heater will not start; fan may not run.
|
Air Pressure Switch / Fan Failure | View Details |
| E05 |
Sime water heater shows E05; unit stops heating and may cycle on and off rapidly.
|
Flow Temperature Sensor Fault (NTC Open/Short) | View Details |
| E06 |
E06 appears on the Sime water heater display; water temperature is erratic or unit shuts down.
|
Inlet / Return Temperature Sensor Fault | View Details |
| E07 |
Sime water heater displays E07 and stops; may occur after long operation.
|
Overheat Thermostat Trip | View Details |
| E08 |
E08 error on Sime water heater; unit attempts to start but shuts down quickly.
|
Flow Switch / Flow Sensor Fault | View Details |
| E09 |
Sime water heater shows E09; unit will not ignite and may indicate gas-related fault.
|
Gas Valve / Gas Supply Fault | View Details |
| E10 |
E10 displayed; Sime water heater does not start and may indicate low water pressure or circulation fault.
|
Low System Water Pressure / Water Circuit Fault | View Details |
| E11 |
Sime water heater shows E11; fan may run continuously or not at all.
|
Fan Speed / Fan Feedback Fault | View Details |
| E12 |
E12 error on Sime water heater; unit may start but then shut down with temperature-related fault.
|
DHW Outlet Over-Temperature / Sensor Disagreement | View Details |
| E13 |
Sime water heater intermittently shows E13; unit may continue to operate with reduced performance.
|
Communication Error Between Control Board and User Interface | View Details |
| E14 |
E14 displayed; Sime water heater fails to modulate correctly, water temperature swings hot and cold.
|
Gas Modulation / Valve Control Fault | View Details |
| E15 |
Sime water heater shows E15; unit may lock out with an internal leak or condensate issue.
|
Internal Leak / Condensate Fault | View Details |
| E16 |
E16 error; Sime water heater indicates sensor short circuit or wiring fault.
|
NTC Sensor Short Circuit | View Details |
| E17 |
Sime water heater shows E17; may be associated with sensor open circuit.
|
NTC Sensor Open Circuit | View Details |
| E18 |
E18 error; Sime water heater may show low flow or blocked heat exchanger indication.
|
Heat Exchanger Flow Restriction | View Details |
| E19 |
Sime water heater intermittently shows E19; unit may reboot or freeze.
|
Internal Control Board Fault / Memory Error | View Details |
| E20 |
E20 displayed; Sime water heater indicates sensor mismatch or calibration error.
|
Temperature Sensor Calibration / Mismatch Fault | View Details |
| – |
Water heater display is completely dead; no lights or response.
|
No Power / Electrical Supply Failure | View Details |
| – |
Water heater display works but buttons or knobs do not respond to input.
|
User Interface Control Failure | View Details |
| – |
Water heater emits a burning smell or plastic smell during operation.
|
Overheating Component / Electrical Overload | View Details |
| – |
Water heater emits a whistling or high-pitched noise when hot water is running.
|
Flow-Induced Noise / Partial Blockage | View Details |
| – |
Water heater fan runs but burner does not light; no error code is displayed.
|
Ignition Sequence Interruption | View Details |
| – |
Water heater frequently cycles on and off rapidly while a tap is open.
|
Short Cycling / Flow Instability | View Details |
| – |
Water heater leaks water from the bottom of the casing.
|
Internal Water Leak | View Details |
| – |
Water heater lights but hot water is only lukewarm, never reaching the set temperature.
|
Insufficient Heating / Underfiring | View Details |
| – |
Water heater makes loud banging or popping noises during operation.
|
Kettling / Boiling in Heat Exchanger | View Details |
| – |
Water heater occasionally emits a small puff or pop at ignition.
|
Delayed Ignition | View Details |
| – |
Water heater output temperature fluctuates between very hot and cold during a single shower.
|
Temperature Fluctuation / Poor Modulation | View Details |
| – |
Water heater produces no hot water at all; display is on but burner never ignites and no error code is shown.
|
No Ignition Without Error Indication | View Details |
| – |
Water heater shows signs of corrosion or rust stains around connections and casing.
|
Corrosion / Long-Term Leakage | View Details |
| – |
Water heater trips the household circuit breaker or RCD when it starts.
|
Electrical Short / Earth Leakage | View Details |
| – |
Water heater vibrates excessively or rattles when the burner is on.
|
Mechanical Vibration / Loose Mounting | View Details |
| – |
Water heater’s flue terminal shows signs of condensation staining or water dripping externally.
|
Condensate Management / Flue Drainage Issue | View Details |
No matching codes found
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