E13 error, unit fails to initiate regeneration at scheduled time

Safety: No hazardous work required for basic checks.

• 1. Confirm time and day: Verify the time-of-day and day-of-week are correctly set on the display.
• 2. Check regeneration mode: Ensure the unit is set to time clock or metered immediate/delayed as desired. If set to demand-only and water use is low, it may not regenerate on a fixed schedule.
• 3. Verify regeneration time: Confirm the regeneration start time (often 2:00 AM) is correctly programmed and not disabled.
• 4. Perform manual regen: Start a manual regeneration. If the unit will not start even manually, suspect a control board fault.

Resolution: If programming is correct and manual regen works but scheduled regen does not occur, replace the RainSoft control board.