E17 error and the unit indicates an inlet water pressure problem.

Safety first: Turn off power before removing any covers. Water pressure may be present.

• Check household pressure: Verify that other fixtures in the home have normal pressure. If not, the issue is upstream of the softener.
• Verify inlet valve: Ensure the AquaSoft inlet valve is fully open and the bypass is in the correct position.
• Inspect pre-filter: If a sediment filter is installed before the softener, replace the cartridge if it is clogged.
• Check pressure sensor: On models with a pressure sensor, inspect the sensor body and wiring. Remove the sensor and check the sensing port for debris. Clean gently and reinstall.
• Replace sensor: If E17 persists with known-good pressure, replace the AquaSoft pressure sensor.