Eldom 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 Eldom electric water heater does not heat; display shows E01 shortly after power-up.
Primary Heating Element Open Circuit
E02
Eldom digital water heater shows E02 and stops heating; water remains cold or lukewarm.
NTC Temperature Sensor Failure or Disconnection
E03
Display shows E03 and heater does not start heating; sometimes occurs after overheating or dry firing.
Overheat Protection / Safety Thermostat Tripped
E04
Eldom water heater shows E04 and does not heat; sometimes accompanied by clicking relays.
Triac/Relay Output Fault or Shorted Heating Circuit
E05
Eldom digital water heater shows E05; temperature reading is unrealistic (e.g., - - or 99°C constantly).
Temperature Sensor Out of Range / Calibration Error
E06
Heater display shows E06, and the unit does not respond to temperature adjustments.
User Interface/Keypad Communication Error
E07
Eldom heater shows E07; the unit may shut down unexpectedly during heating.
Earth Leakage/Ground Fault Detected
E08
The display shows E08; the heater does not heat or only heats intermittently.
Power Supply/Voltage Error
E09
Eldom digital heater shows E09; water may overheat or not reach the set temperature.
Secondary/Backup Thermostat Fault
E10
Eldom heater shows E10; the unit may not fill or may shut down when hot water is drawn.
Dry Tank/No Water Detection
E11
The display shows E11; the heater may heat but shows an error or may shut down intermittently.
Internal Communication Error (Main PCB to Sensor/Module)
E12
Eldom heater shows E12; this may be associated with an external control or smart module not working.
External Module/Remote Control Fault
E13
The display shows E13; the heater may not maintain a stable temperature or may shut down under high demand.
Flow Sensor/Turbine Fault (Instantaneous or Hybrid Models)
E14
Eldom heater shows E14; this may be associated with overheating or a high outlet temperature.
Outlet Temperature Sensor Fault
E15
The display shows E15; the heater may not start or may shut down when the internal temperature is high.
Ambient/Internal Control Compartment Overtemperature
Symptom
Condensation or water droplets appear on the outside of the heater.
Condensation Due to Temperature Difference or Minor Seepage
Symptom
Digital display is blank, but power is present at the heater.
Failed Display Module or Low-Voltage Power Supply
Symptom
Heater cycles on and off very frequently, even with little water usage.
Short Cycling Due to Sensor Placement or Control Logic
Symptom
Heater does not respond to remote control or Wi-Fi app, but heats normally.
Remote Communication Failure
Symptom
Heater emits a rotten egg (sulfur) smell from hot water.
Reaction Between Magnesium Anode and Sulfates in Water
Symptom
Heater installed horizontally does not provide expected hot water volume.
Incorrect Orientation or Piping for Horizontal Model
Symptom
Heater outer casing feels unusually hot to the touch.
Insulation Degradation or Local Overheating
Symptom
Heater vibrates or makes humming/buzzing noises when heating.
Loose Mounting or Electrical Hum
Symptom
Hot water runs out very quickly compared to heater capacity.
Insufficient Effective Storage or Mixing Issue
Symptom
Mechanical thermostat knob is stiff or cannot be turned.
Seized Mechanical Thermostat or Knob Mechanism
Symptom
No hot water at all; water from taps is cold, and the heater is not consuming power (no indicator light).
No Power Supply to Heater
Symptom
No hot water, but the power indicator is on; the tank remains cold.
Failed Heating Element
Symptom
The heater emits a metallic or rusty smell from hot water.
Corroded Tank or Anode Depletion
Symptom
The heater makes loud popping or crackling noises during heating.
Limescale Buildup on Heating Element
Symptom
The heater trips the circuit breaker or RCD as soon as it is switched on.
Electrical Short Circuit or Earth Leakage
Symptom
Water drips from the safety valve discharge pipe, especially when heating.
Normal Thermal Expansion or Faulty Safety / Pressure Relief Valve
Symptom
Water hammer or banging noise in pipes when heater heats or when taps are closed.
Hydraulic Shock / Water Hammer
Symptom
Water heater leaks from the bottom cover or around the element flange.
Element Flange Gasket Leakage
Symptom
Water heater leaks from the top or side, with rust stains on the jacket.
Inner Tank Corrosion / Tank Rupture
Symptom
Water is only lukewarm, not reaching the set temperature.
Thermostat Misadjustment or Partial Element Failure
Symptom
Water is too hot; risk of scalding from taps.
Thermostat Stuck Closed or Sensor Misreading
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Digital Eldom electric water heater does not heat; display shows E01 shortly after power-up.
|
Primary Heating Element Open Circuit | View Details |
| E02 |
Eldom digital water heater shows E02 and stops heating; water remains cold or lukewarm.
|
NTC Temperature Sensor Failure or Disconnection | View Details |
| E03 |
Display shows E03 and heater does not start heating; sometimes occurs after overheating or dry firing.
|
Overheat Protection / Safety Thermostat Tripped | View Details |
| E04 |
Eldom water heater shows E04 and does not heat; sometimes accompanied by clicking relays.
|
Triac/Relay Output Fault or Shorted Heating Circuit | View Details |
| E05 |
Eldom digital water heater shows E05; temperature reading is unrealistic (e.g., - - or 99°C constantly).
|
Temperature Sensor Out of Range / Calibration Error | View Details |
| E06 |
Heater display shows E06, and the unit does not respond to temperature adjustments.
|
User Interface/Keypad Communication Error | View Details |
| E07 |
Eldom heater shows E07; the unit may shut down unexpectedly during heating.
|
Earth Leakage/Ground Fault Detected | View Details |
| E08 |
The display shows E08; the heater does not heat or only heats intermittently.
|
Power Supply/Voltage Error | View Details |
| E09 |
Eldom digital heater shows E09; water may overheat or not reach the set temperature.
|
Secondary/Backup Thermostat Fault | View Details |
| E10 |
Eldom heater shows E10; the unit may not fill or may shut down when hot water is drawn.
|
Dry Tank/No Water Detection | View Details |
| E11 |
The display shows E11; the heater may heat but shows an error or may shut down intermittently.
|
Internal Communication Error (Main PCB to Sensor/Module) | View Details |
| E12 |
Eldom heater shows E12; this may be associated with an external control or smart module not working.
|
External Module/Remote Control Fault | View Details |
| E13 |
The display shows E13; the heater may not maintain a stable temperature or may shut down under high demand.
|
Flow Sensor/Turbine Fault (Instantaneous or Hybrid Models) | View Details |
| E14 |
Eldom heater shows E14; this may be associated with overheating or a high outlet temperature.
|
Outlet Temperature Sensor Fault | View Details |
| E15 |
The display shows E15; the heater may not start or may shut down when the internal temperature is high.
|
Ambient/Internal Control Compartment Overtemperature | View Details |
| – |
Condensation or water droplets appear on the outside of the heater.
|
Condensation Due to Temperature Difference or Minor Seepage | View Details |
| – |
Digital display is blank, but power is present at the heater.
|
Failed Display Module or Low-Voltage Power Supply | View Details |
| – |
Heater cycles on and off very frequently, even with little water usage.
|
Short Cycling Due to Sensor Placement or Control Logic | View Details |
| – |
Heater does not respond to remote control or Wi-Fi app, but heats normally.
|
Remote Communication Failure | View Details |
| – |
Heater emits a rotten egg (sulfur) smell from hot water.
|
Reaction Between Magnesium Anode and Sulfates in Water | View Details |
| – |
Heater installed horizontally does not provide expected hot water volume.
|
Incorrect Orientation or Piping for Horizontal Model | View Details |
| – |
Heater outer casing feels unusually hot to the touch.
|
Insulation Degradation or Local Overheating | View Details |
| – |
Heater vibrates or makes humming/buzzing noises when heating.
|
Loose Mounting or Electrical Hum | View Details |
| – |
Hot water runs out very quickly compared to heater capacity.
|
Insufficient Effective Storage or Mixing Issue | View Details |
| – |
Mechanical thermostat knob is stiff or cannot be turned.
|
Seized Mechanical Thermostat or Knob Mechanism | View Details |
| – |
No hot water at all; water from taps is cold, and the heater is not consuming power (no indicator light).
|
No Power Supply to Heater | View Details |
| – |
No hot water, but the power indicator is on; the tank remains cold.
|
Failed Heating Element | View Details |
| – |
The heater emits a metallic or rusty smell from hot water.
|
Corroded Tank or Anode Depletion | View Details |
| – |
The heater makes loud popping or crackling noises during heating.
|
Limescale Buildup on Heating Element | View Details |
| – |
The heater trips the circuit breaker or RCD as soon as it is switched on.
|
Electrical Short Circuit or Earth Leakage | View Details |
| – |
Water drips from the safety valve discharge pipe, especially when heating.
|
Normal Thermal Expansion or Faulty Safety / Pressure Relief Valve | View Details |
| – |
Water hammer or banging noise in pipes when heater heats or when taps are closed.
|
Hydraulic Shock / Water Hammer | View Details |
| – |
Water heater leaks from the bottom cover or around the element flange.
|
Element Flange Gasket Leakage | View Details |
| – |
Water heater leaks from the top or side, with rust stains on the jacket.
|
Inner Tank Corrosion / Tank Rupture | View Details |
| – |
Water is only lukewarm, not reaching the set temperature.
|
Thermostat Misadjustment or Partial Element Failure | View Details |
| – |
Water is too hot; risk of scalding from taps.
|
Thermostat Stuck Closed or Sensor Misreading | View Details |
No matching codes found
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