AFWFilters

AFWFilters 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
Control valve display shows ERR1 and regeneration will not start
Motor or cam index fault
ERR2
Display shows ERR2 and unit is stuck in one position (service or regeneration)
Position switch / encoder fault
ERR3
Display shows ERR3 and regeneration stops mid-cycle
Brine draw / flow fault
ERR4
Display shows ERR4 and unit will not enter regeneration
Control board communication or program fault
ERR5
Display shows ERR5 and time-of-day will not keep correct time
Real-time clock / power backup fault
ERR6
Display shows ERR6 and valve remains in backwash or brine stage indefinitely
Cycle timeout / incomplete regeneration fault
ERR7
Display shows ERR7 and no water flows through the softener during service
Flow meter / turbine sensor fault
ERR8
Display shows ERR8 and salt usage appears incorrect or regeneration frequency is erratic
Metered regeneration calculation fault
LOW SALT
Display shows LOW SALT or SALT indicator and soft water capacity is reduced
Low brine salt level warning
NO FLOW
Display shows NO FLOW even when water is being used in the house
Flow detection failure
POWER LOSS
Display shows POWER LOSS or flashes and time-of-day resets after outages
Non-volatile memory / backup power issue
SERVICE
Display shows SERVICE or CALL FOR SERVICE and unit may still operate but with limited functions
General service reminder / non-critical fault
Symptom
Brine is not being drawn from the brine tank during regeneration
No brine draw
Symptom
Brine tank does not refill with water after regeneration
No brine refill
Symptom
Brine tank overfills with water and may overflow
Brine tank overfill
Symptom
Control display is blank and softener is unresponsive
No power to control head
Symptom
Display is on but buttons do not respond or respond intermittently
Keypad / user interface failure
Symptom
No water at faucets unless the AFWFilters softener is in bypass
Service flow blockage through control valve
Symptom
Resin beads appear in faucet aerators or plumbing fixtures
Resin loss into plumbing
Symptom
Softener causes noticeable drop in water pressure throughout the house
High pressure loss across softener
Symptom
Softener causes noticeable water hammer or banging pipes during regeneration
Hydraulic shock during valve cycling
Symptom
Softener continuously drains water to the drain line even when not regenerating
Continuous drain flow
Symptom
Softener emits a constant humming noise from the control head
Stalled motor or transformer hum
Symptom
Softener frequently loses programming settings (time, hardness, capacity)
Non-volatile memory instability
Symptom
Softener leaks water from the top of the control valve
Control head external leak
Symptom
Softener makes loud clicking or grinding noises during regeneration
Noisy drive mechanism
Symptom
Softener regenerates at the wrong time of day
Incorrect time-of-day or clock drift
Symptom
Softener remains in bypass and will not return to service position
Bypass valve failure
Symptom
Softener stuck in regeneration and does not return to service position
Valve indexing failure
Symptom
Softener uses excessive salt and regenerates too frequently
Excessive salt consumption
Symptom
Softener uses very little or no salt over weeks of operation
Insufficient brine usage
Symptom
Softener will not regenerate automatically at the programmed time
Automatic regeneration failure
Symptom
Water has a metallic or rotten-egg odor even after softening
Persistent odor through softener
Symptom
Water is salty or has a brine taste immediately after regeneration
Residual brine in service water
Symptom
Water leaks from around the base of the mineral (resin) tank
Tank or distributor leak
Symptom
Water leaks from the brine tank onto the floor
Brine tank leak
Symptom
Water remains hard even though the AFWFilters softener appears to run normally
Loss of softening capacity
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