Display shows “No Regen” or the unit never regenerates automatically.

Safety: No plumbing work is required for basic checks; you will be working only with the control panel.

• Check time and day: Ensure the time of day and day of week are set correctly on the Culligan control.
• Verify regen mode: Enter the programming menu and confirm that automatic regeneration is enabled (metered or time clock mode) and that the capacity and hardness are set correctly.
• Check flow meter operation: Run water and confirm that the display shows flow and usage. If not, troubleshoot the flow meter.
• Manual regeneration test: Start a manual regeneration. If the unit regenerates manually but never automatically, the scheduling or meter input is at fault.