Drazice
Drazice 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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AL1
Drazice water heater display shows AL1 or a general alarm icon; unit may continue to operate with reduced function.
General Warning / Minor Sensor Deviation
AL2
Drazice water heater shows AL2; may indicate a more serious alarm requiring shutdown.
Critical Alarm / Safety Shutdown
E1
Digital Drazice electric water heater will not heat; display shows E1 and heating icon is off.
NTC Temperature Sensor Failure
E2
Drazice digital water heater shows E2 and does not heat or heats erratically.
Overheat / Safety Thermostat Trip or High-Temperature Sensor Error
E3
Drazice electronic water heater displays E3 and stops heating; sometimes accompanied by irregular temperature readings.
Outlet Temperature Sensor Fault
E4
Display on Drazice heater shows E4; unit may not respond to temperature adjustments.
Inlet Temperature Sensor Fault
E5
Drazice digital water heater shows E5 and does not heat; sometimes accompanied by tripping of the circuit breaker.
Heating Element / Power Stage Fault
E6
Control panel of Drazice heater shows E6; unit may lock out and not heat.
Communication / Control Board Internal Error
E7
Drazice electronic heater shows E7; fan or pump (on combined or heat-pump models) does not run.
Fan / Pump Control Error
E8
Drazice heat pump water heater shows E8; compressor does not start.
Compressor Protection / Refrigerant Circuit Fault
E9
Drazice digital heater shows E9; unit may shut down completely.
Power Supply / Voltage Error
F1
Drazice combined electric/indirect water heater shows F1; boiler or external heat source is not recognized.
External Heat Source Sensor / Communication Fault
F2
Drazice combined heater shows F2; coil heating does not operate even though boiler is hot.
Coil Temperature Sensor Fault
F3
Drazice combined heater shows F3; circulation pump for coil does not run.
Coil Circulation Pump Fault
F4
Drazice combined heater shows F4; priority switching between electric and coil heating does not work correctly.
Control Logic / Mode Switching Error
F5
Drazice digital heater shows F5; anti-legionella function fails or stops mid-cycle.
Anti-Legionella Cycle Fault
H1
Drazice heat pump water heater displays H1; reduced or no heating via heat pump mode.
Evaporator Temperature Sensor Fault
H2
Drazice heat pump water heater shows H2; unit may run only on electric backup heating.
Condenser Temperature Sensor Fault
H3
Drazice heat pump water heater shows H3; compressor stops frequently or will not start.
Ambient Air Temperature Sensor Fault
H4
Drazice heat pump water heater displays H4; unit may shut down with a protection alarm.
High-Pressure Protection / Overheat in Refrigerant Circuit
H5
Drazice heat pump water heater shows H5; compressor does not run or runs briefly then stops.
Low-Pressure Protection / Refrigerant Loss
Symptom
Condensate water dripping from unexpected places on a Drazice heat pump water heater.
Condensate Drainage Problem
Symptom
Drazice combined heater coil does not heat the tank even though the boiler is running and hot.
No Heat Transfer from Coil
Symptom
Drazice electronic water heater display is on, but buttons do not respond or menu cannot be changed.
User Interface / Keypad Failure
Symptom
Drazice heat pump water heater is very noisy during operation (compressor or fan noise).
Mechanical Vibration or Worn Bearings
Symptom
Drazice water heater does not turn on at all; no indicator lights or display.
No Power / Supply Failure
Symptom
Drazice water heater emits a metallic or rusty smell and water appears discolored (brownish).
Corrosion and Anode Depletion
Symptom
Drazice water heater frequently cycles on and off over short intervals.
Short Cycling
Symptom
Drazice water heater makes loud popping or crackling noises during heating.
Limescale Buildup on Heating Element
Symptom
Drazice water heater operates but energy consumption is unusually high.
Inefficient Operation
Symptom
Drazice water heater outer casing or top feels unusually hot to the touch.
Insulation Degradation or Overheating
Symptom
Drazice water heater produces a rotten egg (sulfur) smell in hot water.
Bacterial Contamination and Anode Reaction
Symptom
Drazice water heater trips the circuit breaker or RCD (residual current device) when heating starts.
Earth Leakage or Short Circuit in Heating Circuit
Symptom
No water comes out of the hot tap, or flow is very weak, while cold water pressure is normal.
Hot Water Flow Restriction
Symptom
Water dripping from the safety valve discharge pipe on a Drazice water heater, especially during heating.
Normal Expansion Discharge or Overpressure
Symptom
Water heater does not heat at all; no hot water from any tap, no error code displayed on mechanical Drazice models.
Open Heating Element or Tripped Safety Thermostat
Symptom
Water heater leaks from the bottom cover or around the heating flange on a Drazice storage tank.
Tank or Flange Seal Leakage
Symptom
Water is only lukewarm; Drazice heater heats but cannot reach set temperature.
Partial Heating or Thermostat Miscalibration
Symptom
Water temperature fluctuates significantly during a shower; Drazice heater cycles between hot and lukewarm.
Inconsistent Temperature Regulation
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| AL1 |
Drazice water heater display shows AL1 or a general alarm icon; unit may continue to operate with reduced function.
|
General Warning / Minor Sensor Deviation | View Details |
| AL2 |
Drazice water heater shows AL2; may indicate a more serious alarm requiring shutdown.
|
Critical Alarm / Safety Shutdown | View Details |
| E1 |
Digital Drazice electric water heater will not heat; display shows E1 and heating icon is off.
|
NTC Temperature Sensor Failure | View Details |
| E2 |
Drazice digital water heater shows E2 and does not heat or heats erratically.
|
Overheat / Safety Thermostat Trip or High-Temperature Sensor Error | View Details |
| E3 |
Drazice electronic water heater displays E3 and stops heating; sometimes accompanied by irregular temperature readings.
|
Outlet Temperature Sensor Fault | View Details |
| E4 |
Display on Drazice heater shows E4; unit may not respond to temperature adjustments.
|
Inlet Temperature Sensor Fault | View Details |
| E5 |
Drazice digital water heater shows E5 and does not heat; sometimes accompanied by tripping of the circuit breaker.
|
Heating Element / Power Stage Fault | View Details |
| E6 |
Control panel of Drazice heater shows E6; unit may lock out and not heat.
|
Communication / Control Board Internal Error | View Details |
| E7 |
Drazice electronic heater shows E7; fan or pump (on combined or heat-pump models) does not run.
|
Fan / Pump Control Error | View Details |
| E8 |
Drazice heat pump water heater shows E8; compressor does not start.
|
Compressor Protection / Refrigerant Circuit Fault | View Details |
| E9 |
Drazice digital heater shows E9; unit may shut down completely.
|
Power Supply / Voltage Error | View Details |
| F1 |
Drazice combined electric/indirect water heater shows F1; boiler or external heat source is not recognized.
|
External Heat Source Sensor / Communication Fault | View Details |
| F2 |
Drazice combined heater shows F2; coil heating does not operate even though boiler is hot.
|
Coil Temperature Sensor Fault | View Details |
| F3 |
Drazice combined heater shows F3; circulation pump for coil does not run.
|
Coil Circulation Pump Fault | View Details |
| F4 |
Drazice combined heater shows F4; priority switching between electric and coil heating does not work correctly.
|
Control Logic / Mode Switching Error | View Details |
| F5 |
Drazice digital heater shows F5; anti-legionella function fails or stops mid-cycle.
|
Anti-Legionella Cycle Fault | View Details |
| H1 |
Drazice heat pump water heater displays H1; reduced or no heating via heat pump mode.
|
Evaporator Temperature Sensor Fault | View Details |
| H2 |
Drazice heat pump water heater shows H2; unit may run only on electric backup heating.
|
Condenser Temperature Sensor Fault | View Details |
| H3 |
Drazice heat pump water heater shows H3; compressor stops frequently or will not start.
|
Ambient Air Temperature Sensor Fault | View Details |
| H4 |
Drazice heat pump water heater displays H4; unit may shut down with a protection alarm.
|
High-Pressure Protection / Overheat in Refrigerant Circuit | View Details |
| H5 |
Drazice heat pump water heater shows H5; compressor does not run or runs briefly then stops.
|
Low-Pressure Protection / Refrigerant Loss | View Details |
| – |
Condensate water dripping from unexpected places on a Drazice heat pump water heater.
|
Condensate Drainage Problem | View Details |
| – |
Drazice combined heater coil does not heat the tank even though the boiler is running and hot.
|
No Heat Transfer from Coil | View Details |
| – |
Drazice electronic water heater display is on, but buttons do not respond or menu cannot be changed.
|
User Interface / Keypad Failure | View Details |
| – |
Drazice heat pump water heater is very noisy during operation (compressor or fan noise).
|
Mechanical Vibration or Worn Bearings | View Details |
| – |
Drazice water heater does not turn on at all; no indicator lights or display.
|
No Power / Supply Failure | View Details |
| – |
Drazice water heater emits a metallic or rusty smell and water appears discolored (brownish).
|
Corrosion and Anode Depletion | View Details |
| – |
Drazice water heater frequently cycles on and off over short intervals.
|
Short Cycling | View Details |
| – |
Drazice water heater makes loud popping or crackling noises during heating.
|
Limescale Buildup on Heating Element | View Details |
| – |
Drazice water heater operates but energy consumption is unusually high.
|
Inefficient Operation | View Details |
| – |
Drazice water heater outer casing or top feels unusually hot to the touch.
|
Insulation Degradation or Overheating | View Details |
| – |
Drazice water heater produces a rotten egg (sulfur) smell in hot water.
|
Bacterial Contamination and Anode Reaction | View Details |
| – |
Drazice water heater trips the circuit breaker or RCD (residual current device) when heating starts.
|
Earth Leakage or Short Circuit in Heating Circuit | View Details |
| – |
No water comes out of the hot tap, or flow is very weak, while cold water pressure is normal.
|
Hot Water Flow Restriction | View Details |
| – |
Water dripping from the safety valve discharge pipe on a Drazice water heater, especially during heating.
|
Normal Expansion Discharge or Overpressure | View Details |
| – |
Water heater does not heat at all; no hot water from any tap, no error code displayed on mechanical Drazice models.
|
Open Heating Element or Tripped Safety Thermostat | View Details |
| – |
Water heater leaks from the bottom cover or around the heating flange on a Drazice storage tank.
|
Tank or Flange Seal Leakage | View Details |
| – |
Water is only lukewarm; Drazice heater heats but cannot reach set temperature.
|
Partial Heating or Thermostat Miscalibration | View Details |
| – |
Water temperature fluctuates significantly during a shower; Drazice heater cycles between hot and lukewarm.
|
Inconsistent Temperature Regulation | View Details |
No matching codes found
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