Hansgrohe Water Softeners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Control panel shows E01 and the softener does not start a regeneration cycle.
Main Control Board Communication Fault
E02
Display shows E02 and the unit does not draw brine during regeneration.
Brine Valve / Injector Circuit Fault
E03
E03 displayed and the softener remains in regeneration or cannot advance through cycles.
Motorized Valve Positioning Error
E04
E04 on display and no water flow is detected during service even when taps are open.
Flow Sensor Signal Error
E05
E05 displayed and the unit skips or aborts regeneration cycles.
Water Level / Brine Float Switch Error
E06
E06 appears and the softener does not detect inlet water pressure correctly, sometimes staying in standby.
Inlet Pressure / Sensor Fault
E07
E07 displayed and the unit reports abnormal temperature or shuts down during regeneration.
Temperature Sensor Fault
E08
E08 error and the display shows abnormal salt usage or cannot read salt level.
Salt Level Sensor / Probe Error
E09
E09 displayed and the unit fails to complete regeneration, often stopping at the rinse stage.
Drain / Waste Line Flow Error
E10
E10 error and the unit reports excessive water usage or cannot meter usage correctly.
Flow Meter Calibration / Overrun Error
E11
E11 displayed and the softener indicates memory or configuration error, often after a power outage.
EEPROM / Configuration Data Error
E12
E12 error and the display shows abnormal regeneration time or cannot start regeneration at the programmed time.
Real-Time Clock / Timer Fault
E13
E13 displayed and the unit reports resin tank pressure anomaly during regeneration.
Resin Tank Overpressure / Safety Fault
E14
E14 error and the unit indicates resin capacity calculation error or cannot determine remaining capacity.
Resin Capacity / Hardness Setting Error
E15
E15 displayed and the unit reports internal leak detection or unexpected water movement when idle.
Internal Leak / Continuous Flow Detected
E16
E16 error and the unit indicates brine refill fault or cannot refill brine tank properly.
Brine Refill Valve Fault
E17
E17 displayed and the unit reports communication error with external accessories (e.g., remote display or leak sensor).
Accessory Bus Communication Fault
E18
E18 error and the unit indicates resin sensor or quality sensor fault (on models with integrated water quality monitoring).
Water Quality / Resin Exhaustion Sensor Fault
E19
E19 displayed and the unit indicates dual-tank synchronization error (on twin-tank Hansgrohe softeners).
Twin Tank Valve Synchronization Fault
E20
E20 error and the unit indicates general system fault not covered by other codes.
Generic System Fault / Self-Test Failure
Symptom
Softener causes air spurting from taps after regeneration.
Air Ingress into System
Symptom
Softener causes noticeable pressure drop or low flow in the house when in service.
Flow Restriction Through Valve or Media
Symptom
Softener causes water hammer or banging noises in pipes during regeneration.
Hydraulic Shock from Rapid Valve Movement
Symptom
Softener display is on but buttons do not respond or respond intermittently.
Keypad / User Interface Failure
Symptom
Softener display shows incorrect or fluctuating hardness readings on outlet water (models with built-in sensor).
Outlet Hardness Sensor Drift
Symptom
Softener does not draw brine but does not show any error code; regeneration completes quickly.
Silent Brine Draw Failure
Symptom
Softener does not regenerate at all; water remains hard even after expected regeneration time, and no error code is shown.
Regeneration Not Initiating
Symptom
Softener emits a persistent humming or buzzing sound even when not regenerating.
Transformer / Solenoid Hum
Symptom
Softener leaks water around the control head or at the top of the resin tank.
Control Valve / Tank O-Ring Leak
Symptom
Softener makes loud clicking, grinding, or knocking noises during regeneration.
Valve Gear / Motor Drive Noise
Symptom
Softener regenerates too frequently, even with low water usage.
Premature Regeneration / Meter Oversensitivity
Symptom
Softener stuck in bypass; cannot get soft water even when bypass is set to service.
Bypass Valve Failure
Symptom
Softener stuck in regeneration; continues to run water to drain and does not return to service.
Regeneration Cycle Not Advancing
Symptom
Softener uses excessive salt; brine tank empties quickly and salt consumption is much higher than expected.
Excessive Brine Refill / Over-Regeneration
Symptom
Softener uses very little or no salt over weeks of operation.
No Brine Draw / Salt Not Dissolving
Symptom
Softener will not power on; display is blank.
No Power to Control Head
Symptom
Water has a metallic or iron taste and staining appears despite the softener operating.
Iron Fouling of Resin / Insufficient Iron Removal
Symptom
Water has a salty taste after regeneration.
Excess Brine Carryover into Service
Symptom
Water leaking from or around the brine tank onto the floor.
Brine Tank / Brine Line Leak
Symptom
Water remains hard even though the softener appears to regenerate normally.
Reduced Softening Capacity / Resin Exhaustion
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Control panel shows E01 and the softener does not start a regeneration cycle.
|
Main Control Board Communication Fault | View Details |
| E02 |
Display shows E02 and the unit does not draw brine during regeneration.
|
Brine Valve / Injector Circuit Fault | View Details |
| E03 |
E03 displayed and the softener remains in regeneration or cannot advance through cycles.
|
Motorized Valve Positioning Error | View Details |
| E04 |
E04 on display and no water flow is detected during service even when taps are open.
|
Flow Sensor Signal Error | View Details |
| E05 |
E05 displayed and the unit skips or aborts regeneration cycles.
|
Water Level / Brine Float Switch Error | View Details |
| E06 |
E06 appears and the softener does not detect inlet water pressure correctly, sometimes staying in standby.
|
Inlet Pressure / Sensor Fault | View Details |
| E07 |
E07 displayed and the unit reports abnormal temperature or shuts down during regeneration.
|
Temperature Sensor Fault | View Details |
| E08 |
E08 error and the display shows abnormal salt usage or cannot read salt level.
|
Salt Level Sensor / Probe Error | View Details |
| E09 |
E09 displayed and the unit fails to complete regeneration, often stopping at the rinse stage.
|
Drain / Waste Line Flow Error | View Details |
| E10 |
E10 error and the unit reports excessive water usage or cannot meter usage correctly.
|
Flow Meter Calibration / Overrun Error | View Details |
| E11 |
E11 displayed and the softener indicates memory or configuration error, often after a power outage.
|
EEPROM / Configuration Data Error | View Details |
| E12 |
E12 error and the display shows abnormal regeneration time or cannot start regeneration at the programmed time.
|
Real-Time Clock / Timer Fault | View Details |
| E13 |
E13 displayed and the unit reports resin tank pressure anomaly during regeneration.
|
Resin Tank Overpressure / Safety Fault | View Details |
| E14 |
E14 error and the unit indicates resin capacity calculation error or cannot determine remaining capacity.
|
Resin Capacity / Hardness Setting Error | View Details |
| E15 |
E15 displayed and the unit reports internal leak detection or unexpected water movement when idle.
|
Internal Leak / Continuous Flow Detected | View Details |
| E16 |
E16 error and the unit indicates brine refill fault or cannot refill brine tank properly.
|
Brine Refill Valve Fault | View Details |
| E17 |
E17 displayed and the unit reports communication error with external accessories (e.g., remote display or leak sensor).
|
Accessory Bus Communication Fault | View Details |
| E18 |
E18 error and the unit indicates resin sensor or quality sensor fault (on models with integrated water quality monitoring).
|
Water Quality / Resin Exhaustion Sensor Fault | View Details |
| E19 |
E19 displayed and the unit indicates dual-tank synchronization error (on twin-tank Hansgrohe softeners).
|
Twin Tank Valve Synchronization Fault | View Details |
| E20 |
E20 error and the unit indicates general system fault not covered by other codes.
|
Generic System Fault / Self-Test Failure | View Details |
| – |
Softener causes air spurting from taps after regeneration.
|
Air Ingress into System | View Details |
| – |
Softener causes noticeable pressure drop or low flow in the house when in service.
|
Flow Restriction Through Valve or Media | View Details |
| – |
Softener causes water hammer or banging noises in pipes during regeneration.
|
Hydraulic Shock from Rapid Valve Movement | View Details |
| – |
Softener display is on but buttons do not respond or respond intermittently.
|
Keypad / User Interface Failure | View Details |
| – |
Softener display shows incorrect or fluctuating hardness readings on outlet water (models with built-in sensor).
|
Outlet Hardness Sensor Drift | View Details |
| – |
Softener does not draw brine but does not show any error code; regeneration completes quickly.
|
Silent Brine Draw Failure | View Details |
| – |
Softener does not regenerate at all; water remains hard even after expected regeneration time, and no error code is shown.
|
Regeneration Not Initiating | View Details |
| – |
Softener emits a persistent humming or buzzing sound even when not regenerating.
|
Transformer / Solenoid Hum | View Details |
| – |
Softener leaks water around the control head or at the top of the resin tank.
|
Control Valve / Tank O-Ring Leak | View Details |
| – |
Softener makes loud clicking, grinding, or knocking noises during regeneration.
|
Valve Gear / Motor Drive Noise | View Details |
| – |
Softener regenerates too frequently, even with low water usage.
|
Premature Regeneration / Meter Oversensitivity | View Details |
| – |
Softener stuck in bypass; cannot get soft water even when bypass is set to service.
|
Bypass Valve Failure | View Details |
| – |
Softener stuck in regeneration; continues to run water to drain and does not return to service.
|
Regeneration Cycle Not Advancing | View Details |
| – |
Softener uses excessive salt; brine tank empties quickly and salt consumption is much higher than expected.
|
Excessive Brine Refill / Over-Regeneration | View Details |
| – |
Softener uses very little or no salt over weeks of operation.
|
No Brine Draw / Salt Not Dissolving | View Details |
| – |
Softener will not power on; display is blank.
|
No Power to Control Head | View Details |
| – |
Water has a metallic or iron taste and staining appears despite the softener operating.
|
Iron Fouling of Resin / Insufficient Iron Removal | View Details |
| – |
Water has a salty taste after regeneration.
|
Excess Brine Carryover into Service | View Details |
| – |
Water leaking from or around the brine tank onto the floor.
|
Brine Tank / Brine Line Leak | View Details |
| – |
Water remains hard even though the softener appears to regenerate normally.
|
Reduced Softening Capacity / Resin Exhaustion | View Details |
No matching codes found
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