BWT
BWT 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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E1
Display shows E1 and the softener does not start regeneration
Inlet Water Supply Fault
E10
Display shows E10 and the unit indicates a resin capacity or hardness sensor issue
Hardness / Conductivity Sensor Fault
E11
Display shows E11 and the unit reports a communication error between display and valve head
Communication Bus Fault
E12
Display shows E12 and the unit indicates a leak or overflow condition
Leak / Overflow Sensor Activation
E13
Display shows E13 and regeneration cannot be started manually or automatically
Regeneration Lockout / Safety Interlock Fault
E14
Display shows E14 and the unit indicates an internal clock or timekeeping error
Real-Time Clock (RTC) Fault
E15
Display shows E15 and the unit reports an internal sensor calibration error
Internal Sensor Calibration Fault
E2
Display shows E2 and regeneration stops mid-cycle
Brine Tank Low Salt / Brine Draw Fault
E3
Display shows E3 and the valve head remains in one position without completing regeneration
Motor or Cam Position Fault
E4
Display shows E4 and the unit does not measure water usage correctly
Flow Sensor / Turbine Fault
E5
Display shows E5 and the softener does not regenerate at the programmed time
Control Board / Program Memory Fault
E6
Display shows E6 and the unit reports abnormal water temperature or shuts down
Temperature Sensor Fault
E7
Display shows E7 and the unit indicates a salt level sensor problem
Salt Level Sensor / Float Fault
E8
Display shows E8 and the unit reports abnormal pressure or shuts down during regeneration
Inlet/Outlet Pressure Fault
E9
Display shows E9 and the unit will not operate, often after a power event
Power Supply / Low Voltage Fault
Symptom
BWT softener brine tank develops a hard crust of salt (salt bridge) and stops using salt
Salt Bridging
Symptom
BWT softener brine tank forms a mushy sludge at the bottom and clogs components
Salt Mushing
Symptom
BWT softener brine tank overflows or fills too high with water
Brine Refill Overfill
Symptom
BWT softener causes banging or water hammer noises in pipes during regeneration
Water Hammer / Rapid Valve Switching
Symptom
BWT softener causes cross-connection of hard and soft water (mixed hardness at outlets)
Internal or External Bypass / Cross-Connection
Symptom
BWT softener continuously drains water to the waste line even when not regenerating
Continuous Drain / Valve Not Sealing
Symptom
BWT softener display is blank or intermittently turns off
Display Power / Connection Issue
Symptom
BWT softener does not regenerate at all (no cycles occur)
No Regeneration
Symptom
BWT softener emits a constant beeping or alarm sound without a visible error code
Audible Alarm / Hidden Fault
Symptom
BWT softener emits a foul or musty odor from the brine tank
Brine Tank Bacterial / Organic Contamination
Symptom
BWT softener installed but water remains untreated because the unit is in permanent bypass
Incorrect Bypass Valve Position
Symptom
BWT softener leaks water from around the valve head or top of the resin vessel
Valve Head / Tank O-Ring Leak
Symptom
BWT softener makes loud clicking or grinding noises during regeneration
Valve Gear / Motor Drive Noise
Symptom
BWT softener regenerates too often (more frequently than needed)
Over-Frequent Regeneration
Symptom
BWT softener resin tank makes gurgling or air noises during service
Air Ingress / Air in Resin Tank
Symptom
BWT softener shows signs of resin beads in household fixtures (small amber beads in aerators)
Resin Loss into Plumbing
Symptom
BWT softener uses salt much faster than expected
Excessive Salt Consumption
Symptom
BWT water softener does not draw brine from the brine tank during regeneration (brine level does not drop)
No Brine Draw
Symptom
Noticeable drop in water pressure after installing or during operation of the BWT softener
Flow Restriction / Pressure Drop
Symptom
Water has a salty taste after regeneration from the BWT softener
Excess Brine Carryover
Symptom
Water remains hard at taps despite the BWT softener appearing to run normally
Loss of Softening Capacity
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Display shows E1 and the softener does not start regeneration
|
Inlet Water Supply Fault | View Details |
| E10 |
Display shows E10 and the unit indicates a resin capacity or hardness sensor issue
|
Hardness / Conductivity Sensor Fault | View Details |
| E11 |
Display shows E11 and the unit reports a communication error between display and valve head
|
Communication Bus Fault | View Details |
| E12 |
Display shows E12 and the unit indicates a leak or overflow condition
|
Leak / Overflow Sensor Activation | View Details |
| E13 |
Display shows E13 and regeneration cannot be started manually or automatically
|
Regeneration Lockout / Safety Interlock Fault | View Details |
| E14 |
Display shows E14 and the unit indicates an internal clock or timekeeping error
|
Real-Time Clock (RTC) Fault | View Details |
| E15 |
Display shows E15 and the unit reports an internal sensor calibration error
|
Internal Sensor Calibration Fault | View Details |
| E2 |
Display shows E2 and regeneration stops mid-cycle
|
Brine Tank Low Salt / Brine Draw Fault | View Details |
| E3 |
Display shows E3 and the valve head remains in one position without completing regeneration
|
Motor or Cam Position Fault | View Details |
| E4 |
Display shows E4 and the unit does not measure water usage correctly
|
Flow Sensor / Turbine Fault | View Details |
| E5 |
Display shows E5 and the softener does not regenerate at the programmed time
|
Control Board / Program Memory Fault | View Details |
| E6 |
Display shows E6 and the unit reports abnormal water temperature or shuts down
|
Temperature Sensor Fault | View Details |
| E7 |
Display shows E7 and the unit indicates a salt level sensor problem
|
Salt Level Sensor / Float Fault | View Details |
| E8 |
Display shows E8 and the unit reports abnormal pressure or shuts down during regeneration
|
Inlet/Outlet Pressure Fault | View Details |
| E9 |
Display shows E9 and the unit will not operate, often after a power event
|
Power Supply / Low Voltage Fault | View Details |
| – |
BWT softener brine tank develops a hard crust of salt (salt bridge) and stops using salt
|
Salt Bridging | View Details |
| – |
BWT softener brine tank forms a mushy sludge at the bottom and clogs components
|
Salt Mushing | View Details |
| – |
BWT softener brine tank overflows or fills too high with water
|
Brine Refill Overfill | View Details |
| – |
BWT softener causes banging or water hammer noises in pipes during regeneration
|
Water Hammer / Rapid Valve Switching | View Details |
| – |
BWT softener causes cross-connection of hard and soft water (mixed hardness at outlets)
|
Internal or External Bypass / Cross-Connection | View Details |
| – |
BWT softener continuously drains water to the waste line even when not regenerating
|
Continuous Drain / Valve Not Sealing | View Details |
| – |
BWT softener display is blank or intermittently turns off
|
Display Power / Connection Issue | View Details |
| – |
BWT softener does not regenerate at all (no cycles occur)
|
No Regeneration | View Details |
| – |
BWT softener emits a constant beeping or alarm sound without a visible error code
|
Audible Alarm / Hidden Fault | View Details |
| – |
BWT softener emits a foul or musty odor from the brine tank
|
Brine Tank Bacterial / Organic Contamination | View Details |
| – |
BWT softener installed but water remains untreated because the unit is in permanent bypass
|
Incorrect Bypass Valve Position | View Details |
| – |
BWT softener leaks water from around the valve head or top of the resin vessel
|
Valve Head / Tank O-Ring Leak | View Details |
| – |
BWT softener makes loud clicking or grinding noises during regeneration
|
Valve Gear / Motor Drive Noise | View Details |
| – |
BWT softener regenerates too often (more frequently than needed)
|
Over-Frequent Regeneration | View Details |
| – |
BWT softener resin tank makes gurgling or air noises during service
|
Air Ingress / Air in Resin Tank | View Details |
| – |
BWT softener shows signs of resin beads in household fixtures (small amber beads in aerators)
|
Resin Loss into Plumbing | View Details |
| – |
BWT softener uses salt much faster than expected
|
Excessive Salt Consumption | View Details |
| – |
BWT water softener does not draw brine from the brine tank during regeneration (brine level does not drop)
|
No Brine Draw | View Details |
| – |
Noticeable drop in water pressure after installing or during operation of the BWT softener
|
Flow Restriction / Pressure Drop | View Details |
| – |
Water has a salty taste after regeneration from the BWT softener
|
Excess Brine Carryover | View Details |
| – |
Water remains hard at taps despite the BWT softener appearing to run normally
|
Loss of Softening Capacity | View Details |
No matching codes found
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