North Star
North Star 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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Err01
Control panel displays Err01 and regeneration will not start
Turbine / Flow Sensor Signal Fault
Err02
Display shows Err02 and unit does not meter water usage correctly
Meter / Turbine Calibration or No Flow Detected
Err03
Err03 on display, softener stuck in regeneration or will not advance through cycles
Motor / Cam Position Fault
Err04
Err04 displayed, unit powers but buttons are unresponsive or random characters appear
Control Board / Keypad Communication Fault
Err05
Err05 on display, regeneration stops mid-cycle and time does not count down
Regeneration Cycle Timeout / Stalled Valve
Err06
Err06 displayed, no water flow through softener during service even though house has pressure
Internal Bypass / Valve Position Error
Err07
Err07 on display, unit does not keep correct time or loses programming
Control Memory / Power Backup Fault
Err08
Err08 displayed, brine tank does not fill with water before regeneration
Brine Refill / Brine Valve Fault
Err09
Err09 on display, brine draw does not occur during regeneration
No Brine Draw / Suction Fault
Err10
Err10 displayed, unit regenerates too frequently or not at all despite water usage
Metering / Usage Calculation Error
Err11
Err11 on display, salt level indicator not working or always shows empty
Salt Level Sensor / Brine Tank Sensor Fault
Err12
Err12 displayed, unit reports low salt even when tank is full
False Low Salt Alarm
Err13
Err13 on display, unit indicates high salt or overfill condition
High Salt / Brine Overfill Detection Fault
Err14
Err14 displayed, unit reports valve leak or internal leak condition
Internal Valve Leak Detection
Err15
Err15 on display, drain runs continuously even when not regenerating
Continuous Drain / Stuck in Backwash or Rinse
Err16
Err16 displayed, unit indicates high flow or leak alarm when no fixtures are open
False Continuous Flow / Leak Alarm
Err17
Err17 on display, communication error between main control and remote display (if equipped)
Remote Display / Communication Bus Fault
Err18
Err18 displayed, unit reports sensor fault related to temperature or internal monitoring
Internal Temperature / Sensor Fault
Err19
Err19 on display, unit indicates brine tank overflow protection activated
Brine Overflow Protection Fault
Err20
Err20 displayed, unit indicates motor overload or stall condition
Valve Motor Overload
Symptom
Buttons on control panel do not respond or respond intermittently
Keypad / User Interface Failure
Symptom
Display is on but very dim or flickering
Display / Backlight Degradation
Symptom
Rust-colored water after regeneration
Iron Fouling / Resin Contamination
Symptom
Salt forms a hard solid mass in the brine tank (salt bridging)
Salt Bridge / Salt Mushing
Symptom
Softener appears to regenerate, but drain line is dry
No Drain Flow During Regeneration
Symptom
Softener causes low water pressure in the house
Flow Restriction Through Softener
Symptom
Softener does not use salt; salt level never goes down
No Brine Draw / No Regeneration
Symptom
Softener installed but water is still hard at some fixtures only
Partial Bypass / Plumbing Cross-Connection
Symptom
Softener installed in cold area; unit or lines freeze
Freeze Damage / Frozen Valve
Symptom
Softener is very noisy during regeneration (loud banging or whistling)
Regeneration Noise / Water Hammer
Symptom
Softener leaks water from around the valve head
Valve Head External Leak
Symptom
Softener makes clicking or grinding noises from the valve head
Drive Gear / Motor Noise
Symptom
Softener regenerates too often, wasting salt and water
Over-Regeneration / Short Capacity
Symptom
Softener stuck in regeneration and will not return to service
Valve Indexing / Stuck in Cycle
Symptom
Softener uses excessive salt compared to expected consumption
High Salt Consumption
Symptom
Softener will not power on; display is blank
No Power to Control
Symptom
Softener will not start regeneration automatically at scheduled time
Automatic Regeneration Failure
Symptom
Water has salty taste after regeneration
Excess Brine Carryover
Symptom
Water leaking from brine tank onto floor
Brine Tank Overflow / External Leak
Symptom
Water remains hard even after regeneration; no noticeable softening
Insufficient Ion Exchange / Resin Capacity Loss
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| Err01 |
Control panel displays Err01 and regeneration will not start
|
Turbine / Flow Sensor Signal Fault | View Details |
| Err02 |
Display shows Err02 and unit does not meter water usage correctly
|
Meter / Turbine Calibration or No Flow Detected | View Details |
| Err03 |
Err03 on display, softener stuck in regeneration or will not advance through cycles
|
Motor / Cam Position Fault | View Details |
| Err04 |
Err04 displayed, unit powers but buttons are unresponsive or random characters appear
|
Control Board / Keypad Communication Fault | View Details |
| Err05 |
Err05 on display, regeneration stops mid-cycle and time does not count down
|
Regeneration Cycle Timeout / Stalled Valve | View Details |
| Err06 |
Err06 displayed, no water flow through softener during service even though house has pressure
|
Internal Bypass / Valve Position Error | View Details |
| Err07 |
Err07 on display, unit does not keep correct time or loses programming
|
Control Memory / Power Backup Fault | View Details |
| Err08 |
Err08 displayed, brine tank does not fill with water before regeneration
|
Brine Refill / Brine Valve Fault | View Details |
| Err09 |
Err09 on display, brine draw does not occur during regeneration
|
No Brine Draw / Suction Fault | View Details |
| Err10 |
Err10 displayed, unit regenerates too frequently or not at all despite water usage
|
Metering / Usage Calculation Error | View Details |
| Err11 |
Err11 on display, salt level indicator not working or always shows empty
|
Salt Level Sensor / Brine Tank Sensor Fault | View Details |
| Err12 |
Err12 displayed, unit reports low salt even when tank is full
|
False Low Salt Alarm | View Details |
| Err13 |
Err13 on display, unit indicates high salt or overfill condition
|
High Salt / Brine Overfill Detection Fault | View Details |
| Err14 |
Err14 displayed, unit reports valve leak or internal leak condition
|
Internal Valve Leak Detection | View Details |
| Err15 |
Err15 on display, drain runs continuously even when not regenerating
|
Continuous Drain / Stuck in Backwash or Rinse | View Details |
| Err16 |
Err16 displayed, unit indicates high flow or leak alarm when no fixtures are open
|
False Continuous Flow / Leak Alarm | View Details |
| Err17 |
Err17 on display, communication error between main control and remote display (if equipped)
|
Remote Display / Communication Bus Fault | View Details |
| Err18 |
Err18 displayed, unit reports sensor fault related to temperature or internal monitoring
|
Internal Temperature / Sensor Fault | View Details |
| Err19 |
Err19 on display, unit indicates brine tank overflow protection activated
|
Brine Overflow Protection Fault | View Details |
| Err20 |
Err20 displayed, unit indicates motor overload or stall condition
|
Valve Motor Overload | View Details |
| – |
Buttons on control panel do not respond or respond intermittently
|
Keypad / User Interface Failure | View Details |
| – |
Display is on but very dim or flickering
|
Display / Backlight Degradation | View Details |
| – |
Rust-colored water after regeneration
|
Iron Fouling / Resin Contamination | View Details |
| – |
Salt forms a hard solid mass in the brine tank (salt bridging)
|
Salt Bridge / Salt Mushing | View Details |
| – |
Softener appears to regenerate, but drain line is dry
|
No Drain Flow During Regeneration | View Details |
| – |
Softener causes low water pressure in the house
|
Flow Restriction Through Softener | View Details |
| – |
Softener does not use salt; salt level never goes down
|
No Brine Draw / No Regeneration | View Details |
| – |
Softener installed but water is still hard at some fixtures only
|
Partial Bypass / Plumbing Cross-Connection | View Details |
| – |
Softener installed in cold area; unit or lines freeze
|
Freeze Damage / Frozen Valve | View Details |
| – |
Softener is very noisy during regeneration (loud banging or whistling)
|
Regeneration Noise / Water Hammer | View Details |
| – |
Softener leaks water from around the valve head
|
Valve Head External Leak | View Details |
| – |
Softener makes clicking or grinding noises from the valve head
|
Drive Gear / Motor Noise | View Details |
| – |
Softener regenerates too often, wasting salt and water
|
Over-Regeneration / Short Capacity | View Details |
| – |
Softener stuck in regeneration and will not return to service
|
Valve Indexing / Stuck in Cycle | View Details |
| – |
Softener uses excessive salt compared to expected consumption
|
High Salt Consumption | View Details |
| – |
Softener will not power on; display is blank
|
No Power to Control | View Details |
| – |
Softener will not start regeneration automatically at scheduled time
|
Automatic Regeneration Failure | View Details |
| – |
Water has salty taste after regeneration
|
Excess Brine Carryover | View Details |
| – |
Water leaking from brine tank onto floor
|
Brine Tank Overflow / External Leak | View Details |
| – |
Water remains hard even after regeneration; no noticeable softening
|
Insufficient Ion Exchange / Resin Capacity Loss | View Details |
No matching codes found
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