Sterling Water
Sterling Water 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 01
Control display shows “Err 01” and softener will not start a regeneration cycle
Motor or Cam Indexing Fault
Err 02
Display shows “Err 02” and regeneration stops mid-cycle
Position Switch / Encoder Fault
Err 03
Display shows “Err 03” and unit remains in service without regenerating
Flow Meter / Turbine Signal Fault
Err 04
Display shows “Err 04” and time-of-day or regeneration schedule cannot be set or is lost frequently
Control Board Memory / Power Interruption Fault
Err 05
Display shows “Err 05” and unit is stuck in regeneration or will not return to service position
Valve Home Position Not Reached
Err 06
Display shows “Err 06” and brine draw step does not complete
Brine Draw / Injector Fault
Err 07
Display shows “Err 07” and unit fails to refill brine tank at the end of regeneration
Brine Refill / Refill Valve Fault
Err 08
Display shows “Err 08” and no water flow is detected even when faucets are open
No Flow Detected / Flow Sensor Calibration Fault
Err 09
Display shows “Err 09” and unit regenerates too frequently or not at all based on usage
Programming / Hardness Setting Fault
Err 10
Display shows “Err 10” and backwash step does not start or complete
Backwash Valve Position Fault
Err 11
Display shows “Err 11” and unit reports low salt even when salt is present
Salt Level Sensor Fault
Err 12
Display shows “Err 12” and unit indicates high salt or brine overflow risk
Brine Tank Overfill / High Level Fault
Err 13
Display shows “Err 13” and unit reports sensor communication error
Communication Fault Between Control Board and Sensors
Err 14
Display shows “Err 14” and unit will not accept button presses or programming changes
Keypad / User Interface Fault
Err 15
Display shows “Err 15” and unit indicates high temperature or overheated valve
Overtemperature / Thermal Sensor Fault
Err 16
Display shows “Err 16” and unit fails to initiate scheduled regeneration
Timer / Clock Fault
Err 17
Display shows “Err 17” and indicates drain line error or high drain pressure
Drain Line Restriction Fault
Err 18
Display shows “Err 18” and indicates resin tank pressure or internal leak fault
Internal Valve Leak / Pressure Differential Fault
Symptom
Brine tank overflowing or water on floor around brine tank
Brine Tank Overfill
Symptom
Bypass valve is hard to turn or leaks when moved
Bypass Valve Wear or Damage
Symptom
Control display is blank; softener appears completely dead
No Power to Control
Symptom
Display is on but unresponsive or frozen; buttons do not work
Control Lockup / Firmware Hang
Symptom
No water flow to house when softener is in service; water returns when bypassed
Blocked Valve or Resin Bed
Symptom
Resin beads found in household plumbing fixtures or aerators
Resin Loss from Mineral Tank
Symptom
Softener causes banging or water hammer noises during regeneration
Water Hammer / Rapid Valve Transitions
Symptom
Softener causes noticeable drop in water pressure throughout the house
Flow Restriction Through Softener
Symptom
Softener emits unusual odors from brine tank (rotten egg or musty smell)
Brine Tank Contamination
Symptom
Softener installed but water remains untreated; bypass appears to be in service
Incorrect Plumbing / Cross-Connection
Symptom
Softener leaking water from around the control valve or tank neck
External Valve or Tank Neck Leak
Symptom
Softener makes loud clicking or grinding noises during regeneration
Drive Train / Gear Noise
Symptom
Softener never regenerates automatically; only regenerates when forced manually
No Automatic Regeneration
Symptom
Softener not using salt; salt level in brine tank never goes down
No Brine Draw / Salt Not Dissolving
Symptom
Softener regenerates at the wrong time of day
Clock / Time-of-Day Misconfiguration
Symptom
Softener regenerates too often (daily or multiple times per day) without high water use
Over-Regeneration
Symptom
Softener stuck in regeneration; water runs to drain continuously
Valve Stuck in Regeneration / Drain
Symptom
Softener uses too much salt; salt level drops very quickly
Excessive Salt Consumption
Symptom
Softener uses very little or no salt over months
Under-Regeneration / No Salt Usage
Symptom
Water has iron staining or metallic odor even with softener in service
Iron Fouling / Inadequate Iron Removal
Symptom
Water has salty taste after regeneration
Excess Brine Carryover
Symptom
Water remains hard even after regeneration; soap does not lather and scale forms on fixtures
Insufficient Softening Capacity
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| Err 01 |
Control display shows “Err 01” and softener will not start a regeneration cycle
|
Motor or Cam Indexing Fault | View Details |
| Err 02 |
Display shows “Err 02” and regeneration stops mid-cycle
|
Position Switch / Encoder Fault | View Details |
| Err 03 |
Display shows “Err 03” and unit remains in service without regenerating
|
Flow Meter / Turbine Signal Fault | View Details |
| Err 04 |
Display shows “Err 04” and time-of-day or regeneration schedule cannot be set or is lost frequently
|
Control Board Memory / Power Interruption Fault | View Details |
| Err 05 |
Display shows “Err 05” and unit is stuck in regeneration or will not return to service position
|
Valve Home Position Not Reached | View Details |
| Err 06 |
Display shows “Err 06” and brine draw step does not complete
|
Brine Draw / Injector Fault | View Details |
| Err 07 |
Display shows “Err 07” and unit fails to refill brine tank at the end of regeneration
|
Brine Refill / Refill Valve Fault | View Details |
| Err 08 |
Display shows “Err 08” and no water flow is detected even when faucets are open
|
No Flow Detected / Flow Sensor Calibration Fault | View Details |
| Err 09 |
Display shows “Err 09” and unit regenerates too frequently or not at all based on usage
|
Programming / Hardness Setting Fault | View Details |
| Err 10 |
Display shows “Err 10” and backwash step does not start or complete
|
Backwash Valve Position Fault | View Details |
| Err 11 |
Display shows “Err 11” and unit reports low salt even when salt is present
|
Salt Level Sensor Fault | View Details |
| Err 12 |
Display shows “Err 12” and unit indicates high salt or brine overflow risk
|
Brine Tank Overfill / High Level Fault | View Details |
| Err 13 |
Display shows “Err 13” and unit reports sensor communication error
|
Communication Fault Between Control Board and Sensors | View Details |
| Err 14 |
Display shows “Err 14” and unit will not accept button presses or programming changes
|
Keypad / User Interface Fault | View Details |
| Err 15 |
Display shows “Err 15” and unit indicates high temperature or overheated valve
|
Overtemperature / Thermal Sensor Fault | View Details |
| Err 16 |
Display shows “Err 16” and unit fails to initiate scheduled regeneration
|
Timer / Clock Fault | View Details |
| Err 17 |
Display shows “Err 17” and indicates drain line error or high drain pressure
|
Drain Line Restriction Fault | View Details |
| Err 18 |
Display shows “Err 18” and indicates resin tank pressure or internal leak fault
|
Internal Valve Leak / Pressure Differential Fault | View Details |
| – |
Brine tank overflowing or water on floor around brine tank
|
Brine Tank Overfill | View Details |
| – |
Bypass valve is hard to turn or leaks when moved
|
Bypass Valve Wear or Damage | View Details |
| – |
Control display is blank; softener appears completely dead
|
No Power to Control | View Details |
| – |
Display is on but unresponsive or frozen; buttons do not work
|
Control Lockup / Firmware Hang | View Details |
| – |
No water flow to house when softener is in service; water returns when bypassed
|
Blocked Valve or Resin Bed | View Details |
| – |
Resin beads found in household plumbing fixtures or aerators
|
Resin Loss from Mineral Tank | View Details |
| – |
Softener causes banging or water hammer noises during regeneration
|
Water Hammer / Rapid Valve Transitions | View Details |
| – |
Softener causes noticeable drop in water pressure throughout the house
|
Flow Restriction Through Softener | View Details |
| – |
Softener emits unusual odors from brine tank (rotten egg or musty smell)
|
Brine Tank Contamination | View Details |
| – |
Softener installed but water remains untreated; bypass appears to be in service
|
Incorrect Plumbing / Cross-Connection | View Details |
| – |
Softener leaking water from around the control valve or tank neck
|
External Valve or Tank Neck Leak | View Details |
| – |
Softener makes loud clicking or grinding noises during regeneration
|
Drive Train / Gear Noise | View Details |
| – |
Softener never regenerates automatically; only regenerates when forced manually
|
No Automatic Regeneration | View Details |
| – |
Softener not using salt; salt level in brine tank never goes down
|
No Brine Draw / Salt Not Dissolving | View Details |
| – |
Softener regenerates at the wrong time of day
|
Clock / Time-of-Day Misconfiguration | View Details |
| – |
Softener regenerates too often (daily or multiple times per day) without high water use
|
Over-Regeneration | View Details |
| – |
Softener stuck in regeneration; water runs to drain continuously
|
Valve Stuck in Regeneration / Drain | View Details |
| – |
Softener uses too much salt; salt level drops very quickly
|
Excessive Salt Consumption | View Details |
| – |
Softener uses very little or no salt over months
|
Under-Regeneration / No Salt Usage | View Details |
| – |
Water has iron staining or metallic odor even with softener in service
|
Iron Fouling / Inadequate Iron Removal | View Details |
| – |
Water has salty taste after regeneration
|
Excess Brine Carryover | View Details |
| – |
Water remains hard even after regeneration; soap does not lather and scale forms on fixtures
|
Insufficient Softening Capacity | View Details |
No matching codes found
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