Heatrae Sadia
Heatrae Sadia 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
Digital Heatrae Sadia electric water heater will not heat; display shows E01 and water remains cold.
Flow Sensor / Flow Switch Fault
E02
Heatrae Sadia instantaneous electric water heater trips to E02 and stops heating during use.
Overheat Thermostat / Thermal Cut-out Trip
E03
Digital Heatrae Sadia unvented cylinder or electric water heater shows E03 and does not heat water.
NTC Temperature Sensor Fault (Open or Short Circuit)
E04
Heatrae Sadia electric water heater displays E04 and will not operate.
Control PCB Fault / Internal Electronics Error
E05
Heatrae Sadia digital water heater shows E05 and shuts down when a hot tap is opened.
Inlet Temperature Sensor Fault / Cold Inlet NTC Error
E06
Heatrae Sadia electric water heater intermittently stops heating and displays E06.
Outlet Temperature Sensor Fault / Hot Outlet NTC Error
E07
Heatrae Sadia digital water heater shows E07 and does not start heating when a tap is opened.
Triac / Power Switching Device Fault
E08
Heatrae Sadia digital water heater displays E08 and shuts down shortly after opening a hot tap.
Dry-Fire Protection / No Water in Heat Exchanger
E09
Heatrae Sadia electric water heater shows E09 and does not heat; sometimes trips the breaker.
Heating Element / Load Fault
E10
Heatrae Sadia unvented cylinder with electronic controls shows E10 and heating is disabled.
Pressure Sensor / Transducer Fault
E11
Heatrae Sadia digital water heater shows E11 and will not respond to user inputs.
User Interface / Keypad Communication Error
E12
Heatrae Sadia digital water heater intermittently shows E12 and water temperature fluctuates.
Temperature Calibration / Sensor Mismatch Error
E13
Heatrae Sadia water heater shows E13 and locks out shortly after start-up.
Earth Leakage / Ground Fault Detection
E14
Heatrae Sadia digital water heater shows E14 and does not recognise flow changes correctly.
Flow Measurement / Turbine Sensor Error
E15
Heatrae Sadia unvented cylinder with electronic control shows E15 and disables immersion heating.
Cylinder Overtemperature Lockout
E16
Heatrae Sadia digital water heater shows E16 and will not start; fan or pump (if fitted) does not run.
Auxiliary Pump / Fan Control Fault (where applicable)
E17
Heatrae Sadia digital water heater shows E17 and water temperature is limited or unit shuts down.
Outlet Temperature Too High / Anti-Scald Protection
E18
Heatrae Sadia digital water heater shows E18 and limits power output.
Supply Voltage / Power Limitation Error
Symptom
Heatrae Sadia cylinder’s expansion vessel frequently needs recharging and system pressure fluctuates widely.
Expansion Vessel Diaphragm Failure
Symptom
Heatrae Sadia cylinder’s temperature and pressure relief valve discharges hot water intermittently.
Temperature and Pressure Relief Activation
Symptom
Heatrae Sadia digital water heater display works but buttons do not respond or respond intermittently.
Keypad / Touch Control Failure
Symptom
Heatrae Sadia digital water heater shows correct temperature but actual outlet water is much cooler.
Temperature Sensing / Mixing Discrepancy
Symptom
Heatrae Sadia electric water heater does not start when a hot tap is opened (no display change, no heating).
No Flow Detection / Start-Up Failure
Symptom
Heatrae Sadia electric water heater runs but delivers only lukewarm water.
Reduced Heating Output
Symptom
Heatrae Sadia electric water heater trips the circuit breaker or RCD when heating.
Electrical Short or Earth Leakage
Symptom
Heatrae Sadia indirect unvented cylinder does not heat from the boiler, but immersion works.
Indirect Coil / Primary Circuit Fault
Symptom
Heatrae Sadia instantaneous heater display is blank and unit appears dead.
No Power / Dead Control
Symptom
Heatrae Sadia instantaneous water heater cycles rapidly on and off during use, causing temperature swings.
Short Cycling / Unstable Temperature Control
Symptom
Heatrae Sadia point-of-use water heater drips continuously from the hot outlet when not in use.
Thermal Expansion Drip (Open-Vent or Small Unvented Unit)
Symptom
Heatrae Sadia unvented cylinder delivers very low hot water pressure compared to cold.
Reduced Hot Water Flow / Pressure
Symptom
Heatrae Sadia unvented cylinder produces no hot water at any outlet.
Complete Loss of Heating
Symptom
Heatrae Sadia water heater makes loud banging or knocking noises when heating.
Kettling / Boiling Noise in Heat Exchanger or Cylinder
Symptom
Heatrae Sadia water heater vibrates or hums loudly when heating.
Mechanical Vibration / Mounting Issue
Symptom
Unvented Heatrae Sadia cylinder discharges water regularly from the tundish during heating.
Expansion Control / Pressure Relief Valve Discharge
Symptom
Water from a Heatrae Sadia cylinder is excessively hot at the taps, even at low draw-off.
Overheating / Thermostat Failure
Symptom
Water from a Heatrae Sadia cylinder smells unpleasant (sulphur/rotten egg odour).
Bacterial Contamination / Reaction with Anode or Materials
Symptom
Water leaking from the base or side of a Heatrae Sadia unvented cylinder.
Cylinder or Fitting Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Digital Heatrae Sadia electric water heater will not heat; display shows E01 and water remains cold.
|
Flow Sensor / Flow Switch Fault | View Details |
| E02 |
Heatrae Sadia instantaneous electric water heater trips to E02 and stops heating during use.
|
Overheat Thermostat / Thermal Cut-out Trip | View Details |
| E03 |
Digital Heatrae Sadia unvented cylinder or electric water heater shows E03 and does not heat water.
|
NTC Temperature Sensor Fault (Open or Short Circuit) | View Details |
| E04 |
Heatrae Sadia electric water heater displays E04 and will not operate.
|
Control PCB Fault / Internal Electronics Error | View Details |
| E05 |
Heatrae Sadia digital water heater shows E05 and shuts down when a hot tap is opened.
|
Inlet Temperature Sensor Fault / Cold Inlet NTC Error | View Details |
| E06 |
Heatrae Sadia electric water heater intermittently stops heating and displays E06.
|
Outlet Temperature Sensor Fault / Hot Outlet NTC Error | View Details |
| E07 |
Heatrae Sadia digital water heater shows E07 and does not start heating when a tap is opened.
|
Triac / Power Switching Device Fault | View Details |
| E08 |
Heatrae Sadia digital water heater displays E08 and shuts down shortly after opening a hot tap.
|
Dry-Fire Protection / No Water in Heat Exchanger | View Details |
| E09 |
Heatrae Sadia electric water heater shows E09 and does not heat; sometimes trips the breaker.
|
Heating Element / Load Fault | View Details |
| E10 |
Heatrae Sadia unvented cylinder with electronic controls shows E10 and heating is disabled.
|
Pressure Sensor / Transducer Fault | View Details |
| E11 |
Heatrae Sadia digital water heater shows E11 and will not respond to user inputs.
|
User Interface / Keypad Communication Error | View Details |
| E12 |
Heatrae Sadia digital water heater intermittently shows E12 and water temperature fluctuates.
|
Temperature Calibration / Sensor Mismatch Error | View Details |
| E13 |
Heatrae Sadia water heater shows E13 and locks out shortly after start-up.
|
Earth Leakage / Ground Fault Detection | View Details |
| E14 |
Heatrae Sadia digital water heater shows E14 and does not recognise flow changes correctly.
|
Flow Measurement / Turbine Sensor Error | View Details |
| E15 |
Heatrae Sadia unvented cylinder with electronic control shows E15 and disables immersion heating.
|
Cylinder Overtemperature Lockout | View Details |
| E16 |
Heatrae Sadia digital water heater shows E16 and will not start; fan or pump (if fitted) does not run.
|
Auxiliary Pump / Fan Control Fault (where applicable) | View Details |
| E17 |
Heatrae Sadia digital water heater shows E17 and water temperature is limited or unit shuts down.
|
Outlet Temperature Too High / Anti-Scald Protection | View Details |
| E18 |
Heatrae Sadia digital water heater shows E18 and limits power output.
|
Supply Voltage / Power Limitation Error | View Details |
| – |
Heatrae Sadia cylinder’s expansion vessel frequently needs recharging and system pressure fluctuates widely.
|
Expansion Vessel Diaphragm Failure | View Details |
| – |
Heatrae Sadia cylinder’s temperature and pressure relief valve discharges hot water intermittently.
|
Temperature and Pressure Relief Activation | View Details |
| – |
Heatrae Sadia digital water heater display works but buttons do not respond or respond intermittently.
|
Keypad / Touch Control Failure | View Details |
| – |
Heatrae Sadia digital water heater shows correct temperature but actual outlet water is much cooler.
|
Temperature Sensing / Mixing Discrepancy | View Details |
| – |
Heatrae Sadia electric water heater does not start when a hot tap is opened (no display change, no heating).
|
No Flow Detection / Start-Up Failure | View Details |
| – |
Heatrae Sadia electric water heater runs but delivers only lukewarm water.
|
Reduced Heating Output | View Details |
| – |
Heatrae Sadia electric water heater trips the circuit breaker or RCD when heating.
|
Electrical Short or Earth Leakage | View Details |
| – |
Heatrae Sadia indirect unvented cylinder does not heat from the boiler, but immersion works.
|
Indirect Coil / Primary Circuit Fault | View Details |
| – |
Heatrae Sadia instantaneous heater display is blank and unit appears dead.
|
No Power / Dead Control | View Details |
| – |
Heatrae Sadia instantaneous water heater cycles rapidly on and off during use, causing temperature swings.
|
Short Cycling / Unstable Temperature Control | View Details |
| – |
Heatrae Sadia point-of-use water heater drips continuously from the hot outlet when not in use.
|
Thermal Expansion Drip (Open-Vent or Small Unvented Unit) | View Details |
| – |
Heatrae Sadia unvented cylinder delivers very low hot water pressure compared to cold.
|
Reduced Hot Water Flow / Pressure | View Details |
| – |
Heatrae Sadia unvented cylinder produces no hot water at any outlet.
|
Complete Loss of Heating | View Details |
| – |
Heatrae Sadia water heater makes loud banging or knocking noises when heating.
|
Kettling / Boiling Noise in Heat Exchanger or Cylinder | View Details |
| – |
Heatrae Sadia water heater vibrates or hums loudly when heating.
|
Mechanical Vibration / Mounting Issue | View Details |
| – |
Unvented Heatrae Sadia cylinder discharges water regularly from the tundish during heating.
|
Expansion Control / Pressure Relief Valve Discharge | View Details |
| – |
Water from a Heatrae Sadia cylinder is excessively hot at the taps, even at low draw-off.
|
Overheating / Thermostat Failure | View Details |
| – |
Water from a Heatrae Sadia cylinder smells unpleasant (sulphur/rotten egg odour).
|
Bacterial Contamination / Reaction with Anode or Materials | View Details |
| – |
Water leaking from the base or side of a Heatrae Sadia unvented cylinder.
|
Cylinder or Fitting Leak | View Details |
No matching codes found
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