AquaClean
AquaClean 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 will 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.
Motor / Cam Position Fault
E04
E04 error and no water flow through the softener, even though inlet valve is open.
Flow Sensor Failure
E05
E05 displayed and the unit does not regenerate at the programmed time.
Clock / Timekeeping Error
E06
E06 error and the display shows an abnormal or no salt level reading.
Salt Level Sensor Fault
E07
E07 displayed and the unit overfills the brine tank or drains continuously during regeneration.
Drain / Brine Valve Stuck Open
E08
E08 error and the softener does not refill the brine tank with water after regeneration.
Brine Refill Circuit Failure
E09
E09 displayed and water remains hard even after recent regeneration.
Resin Bed / Capacity Sensor Fault
E10
E10 error and the unit reports excessive water usage or frequent regenerations.
Flow Meter Overrun / Leak Detected
E11
E11 displayed and the unit will not accept new programming or settings.
Keypad / User Interface Fault
E12
E12 error and the unit displays low inlet pressure or fails to start regeneration due to pressure.
Low Inlet Water Pressure Detection
E13
E13 displayed and the unit reports high inlet pressure or shuts down to protect components.
High Inlet Water Pressure Detection
E14
E14 error and the unit indicates a problem with the internal temperature sensor.
Temperature Sensor Fault
E15
E15 displayed and the unit reports an internal memory or configuration error.
EEPROM / Configuration Memory Fault
E16
E16 error: The unit indicates a problem with the brine tank overflow or safety float.
Brine Tank Overflow / Safety Float Fault
E17
E17 error: The unit reports a drain line restriction or high backpressure.
Drain Line Blockage / Backpressure Fault
E18
E18 error: The unit indicates an internal leak or cabinet water detection.
Internal Leak Sensor Activation
E19
E19 error: The unit reports a problem with the bypass valve position sensor.
Bypass Position Sensor Fault
E20
E20 error: The unit indicates an overcurrent or short circuit in a valve or motor output.
Output Driver Overcurrent Protection
Symptom
Softened water has a salty taste at faucets after regeneration.
Excess Brine Carryover
Symptom
Softener cabinet or surrounding area shows signs of rust or corrosion.
External Corrosion from Leaks or Salt Exposure
Symptom
Softener causes noticeable drop in water pressure throughout the house.
Flow Restriction Through Softener
Symptom
Softener occasionally draws air into the plumbing, causing sputtering at faucets after regeneration.
Air Intrusion During Regeneration
Symptom
Softener occasionally overflows the brine tank, spilling salty water onto the floor.
Brine Tank Overfill
Symptom
The softener causes noticeable vibration or shaking of nearby pipes during backwash.
Excessive Backwash Flow/Hydraulic Shock
Symptom
The softener display is on, but buttons respond slowly or intermittently.
Keypad Wear/Interface Lag
Symptom
The softener does not use any salt over weeks of operation, and the water gradually becomes hard.
No Brine Draw / Salt Not Consumed
Symptom
The softener emits a constant humming or buzzing noise from the control head.
Transformer/Motor Hum
Symptom
The softener frequently runs out of soft water before the next scheduled regeneration.
Insufficient Capacity/Under-Sizing
Symptom
The softener is stuck in regeneration and continuously runs water to the drain.
Valve Stuck in Regeneration Position
Symptom
The softener makes loud banging or knocking noises in the pipes during regeneration.
Water Hammer/Rapid Valve Operation Noise
Symptom
The softener produces a rotten egg or sulfur smell in the softened water.
Bacterial Contamination/Sulfur Reaction in Resin Bed
Symptom
The softener uses an unusually large amount of salt each month.
Excessive Salt Consumption
Symptom
The softener will not power on; the display is blank and unresponsive.
No Power to Control Head
Symptom
The softener will not start a regeneration cycle at the scheduled time, but no error code is displayed.
Regeneration Scheduling / Control Programming Issue
Symptom
The water softener is leaking from around the valve head or the top of the mineral tank.
Valve Head / Tank O-Ring Leak
Symptom
The water softener is leaking from the brine tank or around the brine line connections.
Brine Tank/Line Leak
Symptom
Water remains hard at faucets even though the AquaClean softener appears to operate normally and displays no error code.
Ineffective Softening / Resin Exhaustion
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Control panel shows E01 and the softener will 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.
|
Motor / Cam Position Fault | View Details |
| E04 |
E04 error and no water flow through the softener, even though inlet valve is open.
|
Flow Sensor Failure | View Details |
| E05 |
E05 displayed and the unit does not regenerate at the programmed time.
|
Clock / Timekeeping Error | View Details |
| E06 |
E06 error and the display shows an abnormal or no salt level reading.
|
Salt Level Sensor Fault | View Details |
| E07 |
E07 displayed and the unit overfills the brine tank or drains continuously during regeneration.
|
Drain / Brine Valve Stuck Open | View Details |
| E08 |
E08 error and the softener does not refill the brine tank with water after regeneration.
|
Brine Refill Circuit Failure | View Details |
| E09 |
E09 displayed and water remains hard even after recent regeneration.
|
Resin Bed / Capacity Sensor Fault | View Details |
| E10 |
E10 error and the unit reports excessive water usage or frequent regenerations.
|
Flow Meter Overrun / Leak Detected | View Details |
| E11 |
E11 displayed and the unit will not accept new programming or settings.
|
Keypad / User Interface Fault | View Details |
| E12 |
E12 error and the unit displays low inlet pressure or fails to start regeneration due to pressure.
|
Low Inlet Water Pressure Detection | View Details |
| E13 |
E13 displayed and the unit reports high inlet pressure or shuts down to protect components.
|
High Inlet Water Pressure Detection | View Details |
| E14 |
E14 error and the unit indicates a problem with the internal temperature sensor.
|
Temperature Sensor Fault | View Details |
| E15 |
E15 displayed and the unit reports an internal memory or configuration error.
|
EEPROM / Configuration Memory Fault | View Details |
| E16 |
E16 error: The unit indicates a problem with the brine tank overflow or safety float.
|
Brine Tank Overflow / Safety Float Fault | View Details |
| E17 |
E17 error: The unit reports a drain line restriction or high backpressure.
|
Drain Line Blockage / Backpressure Fault | View Details |
| E18 |
E18 error: The unit indicates an internal leak or cabinet water detection.
|
Internal Leak Sensor Activation | View Details |
| E19 |
E19 error: The unit reports a problem with the bypass valve position sensor.
|
Bypass Position Sensor Fault | View Details |
| E20 |
E20 error: The unit indicates an overcurrent or short circuit in a valve or motor output.
|
Output Driver Overcurrent Protection | View Details |
| – |
Softened water has a salty taste at faucets after regeneration.
|
Excess Brine Carryover | View Details |
| – |
Softener cabinet or surrounding area shows signs of rust or corrosion.
|
External Corrosion from Leaks or Salt Exposure | View Details |
| – |
Softener causes noticeable drop in water pressure throughout the house.
|
Flow Restriction Through Softener | View Details |
| – |
Softener occasionally draws air into the plumbing, causing sputtering at faucets after regeneration.
|
Air Intrusion During Regeneration | View Details |
| – |
Softener occasionally overflows the brine tank, spilling salty water onto the floor.
|
Brine Tank Overfill | View Details |
| – |
The softener causes noticeable vibration or shaking of nearby pipes during backwash.
|
Excessive Backwash Flow/Hydraulic Shock | View Details |
| – |
The softener display is on, but buttons respond slowly or intermittently.
|
Keypad Wear/Interface Lag | View Details |
| – |
The softener does not use any salt over weeks of operation, and the water gradually becomes hard.
|
No Brine Draw / Salt Not Consumed | View Details |
| – |
The softener emits a constant humming or buzzing noise from the control head.
|
Transformer/Motor Hum | View Details |
| – |
The softener frequently runs out of soft water before the next scheduled regeneration.
|
Insufficient Capacity/Under-Sizing | View Details |
| – |
The softener is stuck in regeneration and continuously runs water to the drain.
|
Valve Stuck in Regeneration Position | View Details |
| – |
The softener makes loud banging or knocking noises in the pipes during regeneration.
|
Water Hammer/Rapid Valve Operation Noise | View Details |
| – |
The softener produces a rotten egg or sulfur smell in the softened water.
|
Bacterial Contamination/Sulfur Reaction in Resin Bed | View Details |
| – |
The softener uses an unusually large amount of salt each month.
|
Excessive Salt Consumption | View Details |
| – |
The softener will not power on; the display is blank and unresponsive.
|
No Power to Control Head | View Details |
| – |
The softener will not start a regeneration cycle at the scheduled time, but no error code is displayed.
|
Regeneration Scheduling / Control Programming Issue | View Details |
| – |
The water softener is leaking from around the valve head or the top of the mineral tank.
|
Valve Head / Tank O-Ring Leak | View Details |
| – |
The water softener is leaking from the brine tank or around the brine line connections.
|
Brine Tank/Line Leak | View Details |
| – |
Water remains hard at faucets even though the AquaClean softener appears to operate normally and displays no error code.
|
Ineffective Softening / Resin Exhaustion | View Details |
No matching codes found
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