E16 error and unit indicates high inlet pressure or pressure sensor fault (on models with sensor)

Safety first: Turn off water supply and relieve pressure before removing any pressure-sensing components.

• Measure actual pressure: Use a pressure gauge on a nearby faucet to confirm inlet pressure. If above the Watersoft rating (often 80 psi), install or adjust a pressure-reducing valve.
• Inspect sensor tubing: If your model uses a remote pressure tube, check for kinks, blockages, or leaks. Clear or replace tubing as needed.
• Check sensor wiring: Verify the pressure sensor connector is fully seated on the control board and free of corrosion.
• Replace sensor: If actual pressure is normal but E16 persists, replace the Watersoft pressure sensor with the correct part number.

Continued operation at excessive pressure can damage the softener and plumbing; correct any pressure issues before clearing the error.