Clack
Clack 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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Err 1
Controller display shows “Err 1” and valve will not start a regeneration cycle.
Motor or Cam Position Error
Err 2
Display shows “Err 2” and valve stops mid-cycle or will not complete regeneration.
Cam Position Switch / Encoder Fault
Err 3
Display shows “Err 3” and regeneration will not start or stops immediately.
Piston / Seal Pack Travel Fault
Err 4
Display shows “Err 4” and the time or regeneration settings cannot be retained.
Memory / Programming Error
Err 5
Display shows “Err 5” and the valve does not respond to button presses or regeneration commands.
Keypad / User Interface Fault
Err 6
Display shows “Err 6” and the valve remains in a single position without completing regeneration.
Regeneration Step Timeout
Err 7
Display shows “Err 7” and the system does not draw brine during regeneration.
Brine Draw Failure Detected
Err 8
Display shows “Err 8” and the system appears to overfill or underfill the brine tank.
Brine Refill / Flow Meter Error
Err 9
Display shows “Err 9” and the system does not count down gallons or initiate regeneration based on usage.
Meter Signal Loss
Low Salt
Display shows “Low Salt” or similar message and an alarm may sound.
Low Brine Salt Level Warning
No AC
Display is blank or shows “No AC” and the valve does not operate.
Loss of Power / Transformer Fault
Service
Display alternates between normal screen and “Service” or wrench icon, indicating a service reminder or detected fault.
General Service Reminder / Non-Critical Fault
Symptom
Brine tank does not refill with water after regeneration; salt remains dry.
No Brine Refill
Symptom
Brine tank overflows or fills with too much water after regeneration.
Brine Tank Overfill
Symptom
Clack water softener causes a salty taste in the softened water after regeneration.
Residual Brine Carryover
Symptom
Clack water softener causes water hammer or banging pipes during regeneration.
Hydraulic Shock During Valve Shifts
Symptom
Clack water softener display is dim, flickering, or unreadable.
Display Power / Backlight Issue
Symptom
Clack water softener display is on but buttons do not respond or respond intermittently.
Unresponsive Keypad
Symptom
Clack water softener does not start regeneration at the programmed time.
Regeneration Not Initiating
Symptom
Clack water softener does not use any salt; salt level never drops.
No Brine Usage
Symptom
Clack water softener emits a rotten egg or foul odor in the softened water.
Bacterial Growth / Sulfur Odor in Softened Water
Symptom
Clack water softener frequently loses time and programming after power outages.
Loss of Non-Volatile Memory / Backup Power
Symptom
Clack water softener is stuck in regeneration and continuously runs water to drain.
Valve Stuck in Regeneration / Continuous Backwash
Symptom
Clack water softener leaks water from around the valve body or top of the mineral tank.
External Valve or Tank Neck Leak
Symptom
Clack water softener makes loud clicking, grinding, or knocking noises during regeneration.
Abnormal Mechanical Noise During Valve Operation
Symptom
Clack water softener regenerates too often, wasting salt and water.
Excessive Regeneration Frequency
Symptom
Clack water softener’s bypass valve is difficult to turn or will not move.
Stiff or Seized Bypass Valve
Symptom
Clack water softener’s meter does not register flow accurately; gallons used seem too low or too high.
Inaccurate Flow Measurement
Symptom
Clack water softener’s mineral tank or valve sweats heavily, causing condensation and puddles.
Condensation on Tank/Valve
Symptom
No water or very low water pressure to the house when the Clack softener is in service position.
Flow Restriction Through Valve
Symptom
Water continuously flows to drain even when the Clack softener is in service and not regenerating.
Internal Valve Leak to Drain
Symptom
Water is intermittently hard, especially just before scheduled regenerations.
Insufficient Regeneration Frequency / Capacity Setting Error
Symptom
Water leaks from the brine line connection or brine well during regeneration.
Brine Line or Brine Well Leak
Symptom
Water remains hard even though the Clack water softener appears to run normally and shows no error codes.
Loss of Softening Capacity / Hard Water Bypass
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| Err 1 |
Controller display shows “Err 1” and valve will not start a regeneration cycle.
|
Motor or Cam Position Error | View Details |
| Err 2 |
Display shows “Err 2” and valve stops mid-cycle or will not complete regeneration.
|
Cam Position Switch / Encoder Fault | View Details |
| Err 3 |
Display shows “Err 3” and regeneration will not start or stops immediately.
|
Piston / Seal Pack Travel Fault | View Details |
| Err 4 |
Display shows “Err 4” and the time or regeneration settings cannot be retained.
|
Memory / Programming Error | View Details |
| Err 5 |
Display shows “Err 5” and the valve does not respond to button presses or regeneration commands.
|
Keypad / User Interface Fault | View Details |
| Err 6 |
Display shows “Err 6” and the valve remains in a single position without completing regeneration.
|
Regeneration Step Timeout | View Details |
| Err 7 |
Display shows “Err 7” and the system does not draw brine during regeneration.
|
Brine Draw Failure Detected | View Details |
| Err 8 |
Display shows “Err 8” and the system appears to overfill or underfill the brine tank.
|
Brine Refill / Flow Meter Error | View Details |
| Err 9 |
Display shows “Err 9” and the system does not count down gallons or initiate regeneration based on usage.
|
Meter Signal Loss | View Details |
| Low Salt |
Display shows “Low Salt” or similar message and an alarm may sound.
|
Low Brine Salt Level Warning | View Details |
| No AC |
Display is blank or shows “No AC” and the valve does not operate.
|
Loss of Power / Transformer Fault | View Details |
| Service |
Display alternates between normal screen and “Service” or wrench icon, indicating a service reminder or detected fault.
|
General Service Reminder / Non-Critical Fault | View Details |
| – |
Brine tank does not refill with water after regeneration; salt remains dry.
|
No Brine Refill | View Details |
| – |
Brine tank overflows or fills with too much water after regeneration.
|
Brine Tank Overfill | View Details |
| – |
Clack water softener causes a salty taste in the softened water after regeneration.
|
Residual Brine Carryover | View Details |
| – |
Clack water softener causes water hammer or banging pipes during regeneration.
|
Hydraulic Shock During Valve Shifts | View Details |
| – |
Clack water softener display is dim, flickering, or unreadable.
|
Display Power / Backlight Issue | View Details |
| – |
Clack water softener display is on but buttons do not respond or respond intermittently.
|
Unresponsive Keypad | View Details |
| – |
Clack water softener does not start regeneration at the programmed time.
|
Regeneration Not Initiating | View Details |
| – |
Clack water softener does not use any salt; salt level never drops.
|
No Brine Usage | View Details |
| – |
Clack water softener emits a rotten egg or foul odor in the softened water.
|
Bacterial Growth / Sulfur Odor in Softened Water | View Details |
| – |
Clack water softener frequently loses time and programming after power outages.
|
Loss of Non-Volatile Memory / Backup Power | View Details |
| – |
Clack water softener is stuck in regeneration and continuously runs water to drain.
|
Valve Stuck in Regeneration / Continuous Backwash | View Details |
| – |
Clack water softener leaks water from around the valve body or top of the mineral tank.
|
External Valve or Tank Neck Leak | View Details |
| – |
Clack water softener makes loud clicking, grinding, or knocking noises during regeneration.
|
Abnormal Mechanical Noise During Valve Operation | View Details |
| – |
Clack water softener regenerates too often, wasting salt and water.
|
Excessive Regeneration Frequency | View Details |
| – |
Clack water softener’s bypass valve is difficult to turn or will not move.
|
Stiff or Seized Bypass Valve | View Details |
| – |
Clack water softener’s meter does not register flow accurately; gallons used seem too low or too high.
|
Inaccurate Flow Measurement | View Details |
| – |
Clack water softener’s mineral tank or valve sweats heavily, causing condensation and puddles.
|
Condensation on Tank/Valve | View Details |
| – |
No water or very low water pressure to the house when the Clack softener is in service position.
|
Flow Restriction Through Valve | View Details |
| – |
Water continuously flows to drain even when the Clack softener is in service and not regenerating.
|
Internal Valve Leak to Drain | View Details |
| – |
Water is intermittently hard, especially just before scheduled regenerations.
|
Insufficient Regeneration Frequency / Capacity Setting Error | View Details |
| – |
Water leaks from the brine line connection or brine well during regeneration.
|
Brine Line or Brine Well Leak | View Details |
| – |
Water remains hard even though the Clack water softener appears to run normally and shows no error codes.
|
Loss of Softening Capacity / Hard Water Bypass | View Details |
No matching codes found
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