Display shows E20 and the unit indicates a regeneration timeout or incomplete cycle.

Safety first: Unplug the unit and close water valves before opening the valve head or working on the drain line.

• 1. Check drain line: Ensure the drain hose is not kinked, elevated too high, or blocked. Clear any obstructions and verify a free flow to drain.
• 2. Listen for motor strain: During regeneration, listen for the drive motor. If it hums but does not move the cam, the piston may be jammed or the motor weak.
• 3. Inspect piston and seals: With water off and pressure relieved, remove the SoftPro valve head cover and access the piston assembly. Look for scoring, swelling, or debris. Replace the piston and seal/spacer kit if worn or damaged.
• 4. Verify correct programming: Ensure cycle times (backwash, brine draw, rinse) are within SoftPro specifications. Extremely long or short times can cause perceived timeouts.
• 5. Replace motor or board: If mechanical parts are free and drain is clear, but E20 persists, replace the drive motor and, if needed, the control board.