Whirlpool Pro Series
Whirlpool Pro Series 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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ERR1
Display shows ERR1 and softener will not start a regeneration cycle
Motor or Valve Position Switch Failure
ERR10
Display shows ERR10 and unit locks out regeneration cycles
Excessive Regeneration or Safety Lockout
ERR2
Display shows ERR2 and unit stops mid-regeneration
Valve Cam Jam or Rotor/Seal Assembly Binding
ERR3
Display shows ERR3 and regeneration will not start or complete
Brine Valve or Brine Piston Failure
ERR4
Display shows ERR4 and time or regeneration settings cannot be saved
Control Board Memory or Keypad Fault
ERR5
Display shows ERR5 and unit does not meter water usage correctly
Turbine / Flow Meter Sensor Failure
ERR6
Display shows ERR6 and softener remains in one position without advancing
Drive Motor Stall or Overcurrent
ERR7
Display shows ERR7 and unit regenerates at incorrect times or not at all
Timekeeping / Clock Circuit Failure
ERR8
Display shows ERR8 and unit reports abnormal water usage or constant flow when no water is running
Flow Meter Signal Error or False Pulsing
ERR9
Display shows ERR9 and unit will not enter or exit regeneration properly
Valve Position Calibration Error
LO SALT
Display shows LO SALT or LOW SALT even when salt is present in the brine tank
Salt Level Detection or Brine Concentration Issue
NO SOFT
Display shows NO SOFT or similar message and water remains hard
Regeneration Not Occurring or Ineffective
SERVICE
Display shows SERVICE or CALL FOR SERVICE and unit stops operating automatically
General System Fault / Control Lockout
Symptom
Brine tank leaks water or brine onto the floor
Brine Tank or Fitting Leak
Symptom
Brine tank overfills with water after regeneration
Brine Refill Control Failure
Symptom
Display is on but buttons do not respond or respond intermittently
Keypad / User Interface Failure
Symptom
Display shows incorrect time or resets to default frequently without error code
Intermittent Power or Weak Backup Circuit
Symptom
Drain line discharges water continuously, even when not regenerating
Valve Not Sealing in Service Position
Symptom
No water flow through the softener; house has no water when unit is in service position
Blocked Valve or Collapsed Distributor Tube
Symptom
Salt bridge forms frequently in the brine tank, causing intermittent hard water
Salt Bridging / Improper Brine Formation
Symptom
Softener causes a plastic or electrical burning smell near the control head
Overheating Electrical Component
Symptom
Softener causes water hammer or banging pipes during regeneration
Rapid Valve Shifts or High Flow Changes
Symptom
Softener discharges water or brine onto the floor from the drain line connection
Drain Line or Air Gap Leak
Symptom
Softener display is blank; unit appears completely dead
No Power to Control Board
Symptom
Softener does not regenerate at all unless started manually
Automatic Regeneration Trigger Failure
Symptom
Softener does not use any salt; salt level never drops
No Brine Draw During Regeneration
Symptom
Softener emits a constant humming noise but does not advance cycles
Stalled Motor or Jammed Valve
Symptom
Softener emits a foul or musty odor from the brine tank
Bacterial or Organic Growth in Brine Tank
Symptom
Softener installed but water bypasses the unit; no change in hardness
Incorrect Plumbing or Bypass Configuration
Symptom
Softener is stuck in regeneration and does not return to service mode
Regeneration Cycle Incomplete / Valve Stuck
Symptom
Softener leaks water around the base of the mineral tank
Tank or Distributor Seal Leak
Symptom
Softener leaks water from the top valve area
Valve Head or O-Ring Seal Leak
Symptom
Softener makes loud clicking, grinding, or knocking noises during regeneration
Gear Train or Motor Noise / Mechanical Wear
Symptom
Softener regenerates at the wrong time of day (e.g., during heavy water use)
Incorrect Time or Regeneration Scheduling
Symptom
Softener regenerates too frequently even with normal water use
Over-Sensitive Metering or Misprogrammed Capacity
Symptom
Softener uses salt very quickly, requiring frequent refills
Over-Regeneration or Excessive Salt Dosage
Symptom
Water pressure is significantly reduced when flowing through the softener
Flow Restriction in Valve or Resin Bed
Symptom
Water remains hard even though the softener appears to run normally (no error code)
Exhausted or Fouled Resin Bed
Symptom
Water tastes salty or briny after regeneration
Insufficient Rinse or Brine Draw Imbalance
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| ERR1 |
Display shows ERR1 and softener will not start a regeneration cycle
|
Motor or Valve Position Switch Failure | View Details |
| ERR10 |
Display shows ERR10 and unit locks out regeneration cycles
|
Excessive Regeneration or Safety Lockout | View Details |
| ERR2 |
Display shows ERR2 and unit stops mid-regeneration
|
Valve Cam Jam or Rotor/Seal Assembly Binding | View Details |
| ERR3 |
Display shows ERR3 and regeneration will not start or complete
|
Brine Valve or Brine Piston Failure | View Details |
| ERR4 |
Display shows ERR4 and time or regeneration settings cannot be saved
|
Control Board Memory or Keypad Fault | View Details |
| ERR5 |
Display shows ERR5 and unit does not meter water usage correctly
|
Turbine / Flow Meter Sensor Failure | View Details |
| ERR6 |
Display shows ERR6 and softener remains in one position without advancing
|
Drive Motor Stall or Overcurrent | View Details |
| ERR7 |
Display shows ERR7 and unit regenerates at incorrect times or not at all
|
Timekeeping / Clock Circuit Failure | View Details |
| ERR8 |
Display shows ERR8 and unit reports abnormal water usage or constant flow when no water is running
|
Flow Meter Signal Error or False Pulsing | View Details |
| ERR9 |
Display shows ERR9 and unit will not enter or exit regeneration properly
|
Valve Position Calibration Error | View Details |
| LO SALT |
Display shows LO SALT or LOW SALT even when salt is present in the brine tank
|
Salt Level Detection or Brine Concentration Issue | View Details |
| NO SOFT |
Display shows NO SOFT or similar message and water remains hard
|
Regeneration Not Occurring or Ineffective | View Details |
| SERVICE |
Display shows SERVICE or CALL FOR SERVICE and unit stops operating automatically
|
General System Fault / Control Lockout | View Details |
| – |
Brine tank leaks water or brine onto the floor
|
Brine Tank or Fitting Leak | View Details |
| – |
Brine tank overfills with water after regeneration
|
Brine Refill Control Failure | View Details |
| – |
Display is on but buttons do not respond or respond intermittently
|
Keypad / User Interface Failure | View Details |
| – |
Display shows incorrect time or resets to default frequently without error code
|
Intermittent Power or Weak Backup Circuit | View Details |
| – |
Drain line discharges water continuously, even when not regenerating
|
Valve Not Sealing in Service Position | View Details |
| – |
No water flow through the softener; house has no water when unit is in service position
|
Blocked Valve or Collapsed Distributor Tube | View Details |
| – |
Salt bridge forms frequently in the brine tank, causing intermittent hard water
|
Salt Bridging / Improper Brine Formation | View Details |
| – |
Softener causes a plastic or electrical burning smell near the control head
|
Overheating Electrical Component | View Details |
| – |
Softener causes water hammer or banging pipes during regeneration
|
Rapid Valve Shifts or High Flow Changes | View Details |
| – |
Softener discharges water or brine onto the floor from the drain line connection
|
Drain Line or Air Gap Leak | View Details |
| – |
Softener display is blank; unit appears completely dead
|
No Power to Control Board | View Details |
| – |
Softener does not regenerate at all unless started manually
|
Automatic Regeneration Trigger Failure | View Details |
| – |
Softener does not use any salt; salt level never drops
|
No Brine Draw During Regeneration | View Details |
| – |
Softener emits a constant humming noise but does not advance cycles
|
Stalled Motor or Jammed Valve | View Details |
| – |
Softener emits a foul or musty odor from the brine tank
|
Bacterial or Organic Growth in Brine Tank | View Details |
| – |
Softener installed but water bypasses the unit; no change in hardness
|
Incorrect Plumbing or Bypass Configuration | View Details |
| – |
Softener is stuck in regeneration and does not return to service mode
|
Regeneration Cycle Incomplete / Valve Stuck | View Details |
| – |
Softener leaks water around the base of the mineral tank
|
Tank or Distributor Seal Leak | View Details |
| – |
Softener leaks water from the top valve area
|
Valve Head or O-Ring Seal Leak | View Details |
| – |
Softener makes loud clicking, grinding, or knocking noises during regeneration
|
Gear Train or Motor Noise / Mechanical Wear | View Details |
| – |
Softener regenerates at the wrong time of day (e.g., during heavy water use)
|
Incorrect Time or Regeneration Scheduling | View Details |
| – |
Softener regenerates too frequently even with normal water use
|
Over-Sensitive Metering or Misprogrammed Capacity | View Details |
| – |
Softener uses salt very quickly, requiring frequent refills
|
Over-Regeneration or Excessive Salt Dosage | View Details |
| – |
Water pressure is significantly reduced when flowing through the softener
|
Flow Restriction in Valve or Resin Bed | View Details |
| – |
Water remains hard even though the softener appears to run normally (no error code)
|
Exhausted or Fouled Resin Bed | View Details |
| – |
Water tastes salty or briny after regeneration
|
Insufficient Rinse or Brine Draw Imbalance | View Details |
No matching codes found
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