Display shows “Err 03” and unit will not complete regeneration

Safety first: Unplug the softener and close the water supply. Place the unit in bypass to relieve pressure.

Step-by-step checks:

• 1. Access the brine valve:
  • Remove the top cover.
  • Locate the brine valve assembly on the valve head where the brine line connects from the salt tank.
  • Disconnect the brine line and inspect for salt blockage or hardened salt at the fitting.
• 2. Inspect and clean:
  • Disassemble the brine valve (note orientation of spring and plunger).
  • Clean the plunger, seat, and port with warm water and a soft brush to remove iron or scale.
  • Ensure the plunger moves freely and the spring is not broken.
• 3. Electrical check (if electric brine valve):
  • Inspect the brine valve coil wiring and connector.
  • If equipped and you are qualified, test the coil for continuity with a multimeter. An open coil means it must be replaced.
• 4. Reassemble and test:
  • Reassemble the brine valve and reconnect the brine line.
  • Restore water and power, take the unit out of bypass, and start a manual regeneration.
  • Watch for proper brine draw and refill. If Err 03 returns, suspect a failed brine valve assembly or control board.