WaterBoss
WaterBoss 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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CL
Display shows 'CL' or clean indicator and unit regenerates more often than expected
Clean Cycle / Iron Cleaning Mode Misconfiguration
E1
Control display shows E1 and unit will not start a regeneration cycle
Control Board Communication / Programming Fault
E2
Display shows E2 and regeneration stops mid-cycle
Drive Motor / Cam Position Fault
E3
Display shows E3 and unit remains in one position of the cycle (e.g., stuck in backwash or brine draw)
Valve Positioning / Encoder Fault
E4
Display shows E4 and unit will not advance through regeneration
Drive Motor Overload / Stall Fault
E5
Display shows E5 and unit does not respond to keypad inputs
Keypad / User Interface Fault
E6
Display shows E6 and time-of-day or regeneration settings will not save
Non-Volatile Memory / Programming Retention Fault
E7
Display shows E7 and unit regenerates at incorrect times or too frequently
Flow Meter / Usage Sensor Fault
E8
Display shows E8 and unit will not initiate regeneration based on usage
Demand Regeneration Logic Fault
E9
Display shows E9 and unit appears to be locked or frozen
Control Lock / Software Hang Fault
H0
Display shows 'H0' or similar hardness error; water remains hard
Hardness Setting / Sensor Input Fault
Lo
Display shows 'Lo' or low power indication; unit intermittently loses settings
Low Voltage / Power Supply Fault
Symptom
Brine tank full of water and may overflow
Brine Tank Overfill
Symptom
No water to house when WaterBoss softener is in service; water returns when in bypass
Internal Bypass / Valve Blockage
Symptom
Salt forms a hard crust (salt bridge) in the WaterBoss brine cabinet
Salt Bridging
Symptom
Softener does not use any salt; salt level never goes down
No Brine Draw / Brining Failure
Symptom
Water remains hard even though the WaterBoss softener appears to run normally
Resin Bed Exhaustion or Fouling
Symptom
WaterBoss softener bypass valve is hard to turn or leaks around the stem
Bypass Valve Wear or Seizing
Symptom
WaterBoss softener causes intermittent bursts of air at faucets
Air in Softener or Plumbing
Symptom
WaterBoss softener causes low water pressure throughout the house when in service
Flow Restriction Through Softener
Symptom
WaterBoss softener display is blank; unit appears dead
No Power to Control
Symptom
WaterBoss softener display works but buttons do not respond
Keypad Failure
Symptom
WaterBoss softener drain line discharges water onto the floor or backs up
Improper Drain Line Installation / Blockage
Symptom
WaterBoss softener emits a constant humming or buzzing sound from the control area
Transformer or Motor Noise
Symptom
WaterBoss softener emits a musty or moldy odor from the brine cabinet
Brine Cabinet Mold / Bacteria Growth
Symptom
WaterBoss softener emits a rotten egg or sulfur smell from treated water
Bacterial Growth or Sulfur Contamination
Symptom
WaterBoss softener frequently loses time and settings after brief power outages
Memory Retention / Backup Failure
Symptom
WaterBoss softener is not drawing brine during regeneration (brine level does not drop)
Brine Draw Failure
Symptom
WaterBoss softener is stuck in regeneration and will not return to service
Regeneration Cycle Stuck
Symptom
WaterBoss softener leaks water from around the valve body or top cover
Valve Body External Leak
Symptom
WaterBoss softener leaks water into the drain continuously, even when not regenerating
Continuous Drain Flow
Symptom
WaterBoss softener makes grinding or clicking noises when changing cycles
Drive Gear / Cam Wear
Symptom
WaterBoss softener makes loud banging or hammering noises during regeneration
Water Hammer / Rapid Valve Cycling
Symptom
WaterBoss softener produces salty-tasting water after regeneration
Insufficient Rinse / Excess Brine Carryover
Symptom
WaterBoss softener resin beads found in household faucets or aerators
Resin Loss into Plumbing
Symptom
WaterBoss softener uses excessive salt; salt level drops very quickly
Over-Brining / Excessive Regeneration
Symptom
WaterBoss softener will not regenerate automatically; only regenerates when forced manually
Automatic Regeneration Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CL |
Display shows 'CL' or clean indicator and unit regenerates more often than expected
|
Clean Cycle / Iron Cleaning Mode Misconfiguration | View Details |
| E1 |
Control display shows E1 and unit will not start a regeneration cycle
|
Control Board Communication / Programming Fault | View Details |
| E2 |
Display shows E2 and regeneration stops mid-cycle
|
Drive Motor / Cam Position Fault | View Details |
| E3 |
Display shows E3 and unit remains in one position of the cycle (e.g., stuck in backwash or brine draw)
|
Valve Positioning / Encoder Fault | View Details |
| E4 |
Display shows E4 and unit will not advance through regeneration
|
Drive Motor Overload / Stall Fault | View Details |
| E5 |
Display shows E5 and unit does not respond to keypad inputs
|
Keypad / User Interface Fault | View Details |
| E6 |
Display shows E6 and time-of-day or regeneration settings will not save
|
Non-Volatile Memory / Programming Retention Fault | View Details |
| E7 |
Display shows E7 and unit regenerates at incorrect times or too frequently
|
Flow Meter / Usage Sensor Fault | View Details |
| E8 |
Display shows E8 and unit will not initiate regeneration based on usage
|
Demand Regeneration Logic Fault | View Details |
| E9 |
Display shows E9 and unit appears to be locked or frozen
|
Control Lock / Software Hang Fault | View Details |
| H0 |
Display shows 'H0' or similar hardness error; water remains hard
|
Hardness Setting / Sensor Input Fault | View Details |
| Lo |
Display shows 'Lo' or low power indication; unit intermittently loses settings
|
Low Voltage / Power Supply Fault | View Details |
| – |
Brine tank full of water and may overflow
|
Brine Tank Overfill | View Details |
| – |
No water to house when WaterBoss softener is in service; water returns when in bypass
|
Internal Bypass / Valve Blockage | View Details |
| – |
Salt forms a hard crust (salt bridge) in the WaterBoss brine cabinet
|
Salt Bridging | View Details |
| – |
Softener does not use any salt; salt level never goes down
|
No Brine Draw / Brining Failure | View Details |
| – |
Water remains hard even though the WaterBoss softener appears to run normally
|
Resin Bed Exhaustion or Fouling | View Details |
| – |
WaterBoss softener bypass valve is hard to turn or leaks around the stem
|
Bypass Valve Wear or Seizing | View Details |
| – |
WaterBoss softener causes intermittent bursts of air at faucets
|
Air in Softener or Plumbing | View Details |
| – |
WaterBoss softener causes low water pressure throughout the house when in service
|
Flow Restriction Through Softener | View Details |
| – |
WaterBoss softener display is blank; unit appears dead
|
No Power to Control | View Details |
| – |
WaterBoss softener display works but buttons do not respond
|
Keypad Failure | View Details |
| – |
WaterBoss softener drain line discharges water onto the floor or backs up
|
Improper Drain Line Installation / Blockage | View Details |
| – |
WaterBoss softener emits a constant humming or buzzing sound from the control area
|
Transformer or Motor Noise | View Details |
| – |
WaterBoss softener emits a musty or moldy odor from the brine cabinet
|
Brine Cabinet Mold / Bacteria Growth | View Details |
| – |
WaterBoss softener emits a rotten egg or sulfur smell from treated water
|
Bacterial Growth or Sulfur Contamination | View Details |
| – |
WaterBoss softener frequently loses time and settings after brief power outages
|
Memory Retention / Backup Failure | View Details |
| – |
WaterBoss softener is not drawing brine during regeneration (brine level does not drop)
|
Brine Draw Failure | View Details |
| – |
WaterBoss softener is stuck in regeneration and will not return to service
|
Regeneration Cycle Stuck | View Details |
| – |
WaterBoss softener leaks water from around the valve body or top cover
|
Valve Body External Leak | View Details |
| – |
WaterBoss softener leaks water into the drain continuously, even when not regenerating
|
Continuous Drain Flow | View Details |
| – |
WaterBoss softener makes grinding or clicking noises when changing cycles
|
Drive Gear / Cam Wear | View Details |
| – |
WaterBoss softener makes loud banging or hammering noises during regeneration
|
Water Hammer / Rapid Valve Cycling | View Details |
| – |
WaterBoss softener produces salty-tasting water after regeneration
|
Insufficient Rinse / Excess Brine Carryover | View Details |
| – |
WaterBoss softener resin beads found in household faucets or aerators
|
Resin Loss into Plumbing | View Details |
| – |
WaterBoss softener uses excessive salt; salt level drops very quickly
|
Over-Brining / Excessive Regeneration | View Details |
| – |
WaterBoss softener will not regenerate automatically; only regenerates when forced manually
|
Automatic Regeneration Failure | View Details |
No matching codes found
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