E16 displayed and unit indicates low inlet pressure or fails to regenerate properly

Safety first: Turn off power to the well pump if you suspect pump issues. Depressurize the system slowly to avoid water hammer.

Step-by-step:

• Measure pressure: Use a gauge to confirm that pressure at the softener is at least the minimum specified (often 20–25 psi).
• Check inlet valve: Ensure the inlet shutoff and AquaUnique bypass valves are fully open.
• Inspect pre-filter: If a sediment or carbon pre-filter is installed, replace the cartridge if dirty or clogged.
• Test pump system: On well systems, verify that the pump cycles correctly and that the pressure tank is not waterlogged.

When to call a technician: If pressure remains low or fluctuates significantly, have a plumber or pump specialist correct the supply issue before further softener service.