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 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 and the unit indicates a problem with the brine tank overflow or safety float.
Brine Tank Overflow / Safety Float Fault
E17
E17 displayed and the unit reports a drain line restriction or high backpressure.
Drain Line Blockage / Backpressure Fault
E18
E18 error and the unit indicates an internal leak or cabinet water detection.
Internal Leak Sensor Activation
E19
E19 displayed and the unit reports a problem with the bypass valve position sensor.
Bypass Position Sensor Fault
E20
E20 error and 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 causes noticeable vibration or shaking of nearby pipes during backwash.
Excessive Backwash Flow / Hydraulic Shock
Symptom
Softener display is on but buttons respond slowly or intermittently.
Keypad Wear / Interface Lag
Symptom
Softener does not use any salt over weeks of operation and water gradually becomes hard.
No Brine Draw / Salt Not Consumed
Symptom
Softener emits a constant humming or buzzing noise from the control head.
Transformer / Motor Hum
Symptom
Softener frequently runs out of soft water before the next scheduled regeneration.
Insufficient Capacity / Under-Sizing
Symptom
Softener is stuck in regeneration and continuously runs water to the drain.
Valve Stuck in Regeneration Position
Symptom
Softener makes loud banging or knocking noises in the pipes during regeneration.
Water Hammer / Rapid Valve Operation Noise
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
Softener produces a rotten egg or sulfur smell in the softened water.
Bacterial Contamination / Sulfur Reaction in Resin Bed
Symptom
Softener uses an unusually large amount of salt each month.
Excessive Salt Consumption
Symptom
Softener will not power on; display is blank and unresponsive.
No Power to Control Head
Symptom
Softener will not start a regeneration cycle at the scheduled time, but no error code is shown.
Regeneration Scheduling / Control Programming Issue
Symptom
Water remains hard at faucets even though the AquaClean softener appears to run normally and shows no error code.
Ineffective Softening / Resin Exhaustion
Symptom
Water softener is leaking from around the valve head or top of the mineral tank.
Valve Head / Tank O-Ring Leak
Symptom
Water softener is leaking from the brine tank or around the brine line connections.
Brine Tank / Line Leak
| 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 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 and the unit indicates a problem with the brine tank overflow or safety float.
|
Brine Tank Overflow / Safety Float Fault | View Details |
| E17 |
E17 displayed and the unit reports a drain line restriction or high backpressure.
|
Drain Line Blockage / Backpressure Fault | View Details |
| E18 |
E18 error and the unit indicates an internal leak or cabinet water detection.
|
Internal Leak Sensor Activation | View Details |
| E19 |
E19 displayed and the unit reports a problem with the bypass valve position sensor.
|
Bypass Position Sensor Fault | View Details |
| E20 |
E20 error and 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 causes noticeable vibration or shaking of nearby pipes during backwash.
|
Excessive Backwash Flow / Hydraulic Shock | View Details |
| – |
Softener display is on but buttons respond slowly or intermittently.
|
Keypad Wear / Interface Lag | View Details |
| – |
Softener does not use any salt over weeks of operation and water gradually becomes hard.
|
No Brine Draw / Salt Not Consumed | View Details |
| – |
Softener emits a constant humming or buzzing noise from the control head.
|
Transformer / Motor Hum | View Details |
| – |
Softener frequently runs out of soft water before the next scheduled regeneration.
|
Insufficient Capacity / Under-Sizing | View Details |
| – |
Softener is stuck in regeneration and continuously runs water to the drain.
|
Valve Stuck in Regeneration Position | View Details |
| – |
Softener makes loud banging or knocking noises in the pipes during regeneration.
|
Water Hammer / Rapid Valve Operation Noise | 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 |
| – |
Softener produces a rotten egg or sulfur smell in the softened water.
|
Bacterial Contamination / Sulfur Reaction in Resin Bed | View Details |
| – |
Softener uses an unusually large amount of salt each month.
|
Excessive Salt Consumption | View Details |
| – |
Softener will not power on; display is blank and unresponsive.
|
No Power to Control Head | View Details |
| – |
Softener will not start a regeneration cycle at the scheduled time, but no error code is shown.
|
Regeneration Scheduling / Control Programming Issue | View Details |
| – |
Water remains hard at faucets even though the AquaClean softener appears to run normally and shows no error code.
|
Ineffective Softening / Resin Exhaustion | View Details |
| – |
Water softener is leaking from around the valve head or top of the mineral tank.
|
Valve Head / Tank O-Ring Leak | View Details |
| – |
Water softener is leaking from the brine tank or around the brine line connections.
|
Brine Tank / Line Leak | View Details |
No matching codes found
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