Clearwater
Clearwater 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
The control panel shows E01, and the softener will not start a regeneration cycle.
Inlet Water Supply Fault
E02
The display shows E02, and the unit stops mid-regeneration.
Brine Tank Low Salt / Empty Brine Fault
E03
E03 is displayed, and the softener does not advance through regeneration stages.
Motor / Drive Fault
E04
E04 appears, and the display backlight may flicker; the unit may reset randomly.
Low Voltage / Power Supply Fault
E05
E05 is displayed, and the softener regenerates at incorrect times or not at all.
Clock / Timekeeping Fault
E06
E06 error, and water remains hard even after regeneration.
Flow Sensor / Meter Fault
E07
E07 is displayed, and the unit stops with water running to drain continuously.
Valve Position Error
E08
E08 appears, and the brine tank overfills with water.
Brine Refill / Overflow Fault
E09
E09 is displayed, and no water flows to the drain during backwash or brine draw.
Drain Line / Backwash Fault
E10
E10 error, and the display shows extremely high or zero hardness readings (on models with a built-in sensor).
Hardness Sensor Fault
E11
E11 is displayed, and the unit will not accept new settings or loses programming when unplugged.
Memory / EEPROM Fault
E12
E12 error, and the unit displays a sensor temperature out-of-range message (on models with temperature monitoring).
Temperature Sensor Fault
E13
E13 is displayed, and the unit indicates excessive regeneration frequency or salt usage.
Excessive Regeneration / Programming Fault
E14
E14 error, and the unit reports no regeneration for an extended period despite water usage.
Regeneration Inhibit / Lockout Fault
E15
E15 is displayed, and the unit indicates a resin tank pressure or leak fault (on models with a pressure sensor).
Pressure / Leak Detection Fault
E16
E16 is displayed, and the unit reports a communication error between the display and the main board (on modular models).
Communication Bus Fault
E17
E17 error, and the unit indicates a brine draw timeout.
Brine Draw Timeout Fault
E18
E18 is displayed, and the unit indicates a salt level sensor error (on models with an electronic salt sensor).
Salt Level Sensor Fault
E19
E19 error is displayed, and the unit indicates an internal software fault.
Firmware / Software Fault
E20
E20 is displayed, and the unit indicates an overload or short on an auxiliary output (e.g., brine pump or external valve).
Auxiliary Output Overcurrent Fault
Symptom
Clearwater softener brine tank is dry (no water) even immediately before regeneration.
No Brine Refill
Symptom
Clearwater softener causes a noticeable drop in water pressure throughout the house.
Flow Restriction Through Softener
Symptom
Clearwater softener causes iron staining or sulfur odor even though hardness is reduced.
Resin Fouling / Inadequate Pretreatment
Symptom
Clearwater softener display is blank or unresponsive, but the outlet has power.
No Display / Dead Control Panel
Symptom
Clearwater softener display works, but buttons do not respond or respond intermittently.
Keypad / User Interface Failure
Symptom
Clearwater softener does not draw brine during regeneration (brine level remains unchanged).
No Brine Draw
Symptom
Clearwater softener emits a constant hissing or trickling sound even when not regenerating.
Continuous Bypass or Internal Leak
Symptom
Clearwater softener installed in a cold climate stops working after freezing temperatures.
Freeze Damage
Symptom
Clearwater softener is installed, but water is still supplied unsoftened (no change when bypass is toggled).
Incorrect Plumbing / Cross-Connection
Symptom
Clearwater softener makes grinding or clicking noises from the control head during regeneration.
Drive Gear Wear / Motor Strain
Symptom
The Clearwater softener is stuck in regeneration and continues to run water to drain.
Stuck in Regeneration Cycle
Symptom
The Clearwater softener leaks water around the control valve or tank neck.
Control Valve / Tank Neck Leak
Symptom
The Clearwater softener makes loud banging or hammering noises when changing cycles.
Water Hammer / Rapid Valve Closure
Symptom
The Clearwater softener will not start a regeneration cycle automatically, but manual regeneration works.
Automatic Regeneration Failure
Symptom
The brine tank has water, but the salt level does not go down over time.
Salt Bridge / Salt Mushing
Symptom
The water softener brine tank overflows or fills nearly to the top with water between cycles.
Brine Tank Overfill
Symptom
Water has a salty taste immediately after regeneration.
Insufficient Rinse / Residual Brine
Symptom
Water remains hard at faucets even though the Clearwater water softener appears to run normally (no error code).
Resin Exhaustion / Ineffective Softening
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
The control panel shows E01, and the softener will not start a regeneration cycle.
|
Inlet Water Supply Fault | View Details |
| E02 |
The display shows E02, and the unit stops mid-regeneration.
|
Brine Tank Low Salt / Empty Brine Fault | View Details |
| E03 |
E03 is displayed, and the softener does not advance through regeneration stages.
|
Motor / Drive Fault | View Details |
| E04 |
E04 appears, and the display backlight may flicker; the unit may reset randomly.
|
Low Voltage / Power Supply Fault | View Details |
| E05 |
E05 is displayed, and the softener regenerates at incorrect times or not at all.
|
Clock / Timekeeping Fault | View Details |
| E06 |
E06 error, and water remains hard even after regeneration.
|
Flow Sensor / Meter Fault | View Details |
| E07 |
E07 is displayed, and the unit stops with water running to drain continuously.
|
Valve Position Error | View Details |
| E08 |
E08 appears, and the brine tank overfills with water.
|
Brine Refill / Overflow Fault | View Details |
| E09 |
E09 is displayed, and no water flows to the drain during backwash or brine draw.
|
Drain Line / Backwash Fault | View Details |
| E10 |
E10 error, and the display shows extremely high or zero hardness readings (on models with a built-in sensor).
|
Hardness Sensor Fault | View Details |
| E11 |
E11 is displayed, and the unit will not accept new settings or loses programming when unplugged.
|
Memory / EEPROM Fault | View Details |
| E12 |
E12 error, and the unit displays a sensor temperature out-of-range message (on models with temperature monitoring).
|
Temperature Sensor Fault | View Details |
| E13 |
E13 is displayed, and the unit indicates excessive regeneration frequency or salt usage.
|
Excessive Regeneration / Programming Fault | View Details |
| E14 |
E14 error, and the unit reports no regeneration for an extended period despite water usage.
|
Regeneration Inhibit / Lockout Fault | View Details |
| E15 |
E15 is displayed, and the unit indicates a resin tank pressure or leak fault (on models with a pressure sensor).
|
Pressure / Leak Detection Fault | View Details |
| E16 |
E16 is displayed, and the unit reports a communication error between the display and the main board (on modular models).
|
Communication Bus Fault | View Details |
| E17 |
E17 error, and the unit indicates a brine draw timeout.
|
Brine Draw Timeout Fault | View Details |
| E18 |
E18 is displayed, and the unit indicates a salt level sensor error (on models with an electronic salt sensor).
|
Salt Level Sensor Fault | View Details |
| E19 |
E19 error is displayed, and the unit indicates an internal software fault.
|
Firmware / Software Fault | View Details |
| E20 |
E20 is displayed, and the unit indicates an overload or short on an auxiliary output (e.g., brine pump or external valve).
|
Auxiliary Output Overcurrent Fault | View Details |
| – |
Clearwater softener brine tank is dry (no water) even immediately before regeneration.
|
No Brine Refill | View Details |
| – |
Clearwater softener causes a noticeable drop in water pressure throughout the house.
|
Flow Restriction Through Softener | View Details |
| – |
Clearwater softener causes iron staining or sulfur odor even though hardness is reduced.
|
Resin Fouling / Inadequate Pretreatment | View Details |
| – |
Clearwater softener display is blank or unresponsive, but the outlet has power.
|
No Display / Dead Control Panel | View Details |
| – |
Clearwater softener display works, but buttons do not respond or respond intermittently.
|
Keypad / User Interface Failure | View Details |
| – |
Clearwater softener does not draw brine during regeneration (brine level remains unchanged).
|
No Brine Draw | View Details |
| – |
Clearwater softener emits a constant hissing or trickling sound even when not regenerating.
|
Continuous Bypass or Internal Leak | View Details |
| – |
Clearwater softener installed in a cold climate stops working after freezing temperatures.
|
Freeze Damage | View Details |
| – |
Clearwater softener is installed, but water is still supplied unsoftened (no change when bypass is toggled).
|
Incorrect Plumbing / Cross-Connection | View Details |
| – |
Clearwater softener makes grinding or clicking noises from the control head during regeneration.
|
Drive Gear Wear / Motor Strain | View Details |
| – |
The Clearwater softener is stuck in regeneration and continues to run water to drain.
|
Stuck in Regeneration Cycle | View Details |
| – |
The Clearwater softener leaks water around the control valve or tank neck.
|
Control Valve / Tank Neck Leak | View Details |
| – |
The Clearwater softener makes loud banging or hammering noises when changing cycles.
|
Water Hammer / Rapid Valve Closure | View Details |
| – |
The Clearwater softener will not start a regeneration cycle automatically, but manual regeneration works.
|
Automatic Regeneration Failure | View Details |
| – |
The brine tank has water, but the salt level does not go down over time.
|
Salt Bridge / Salt Mushing | View Details |
| – |
The water softener brine tank overflows or fills nearly to the top with water between cycles.
|
Brine Tank Overfill | View Details |
| – |
Water has a salty taste immediately after regeneration.
|
Insufficient Rinse / Residual Brine | View Details |
| – |
Water remains hard at faucets even though the Clearwater water softener appears to run normally (no error code).
|
Resin Exhaustion / Ineffective Softening | View Details |
No matching codes found
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