Softener does not regenerate at scheduled time; display shows correct time but no cycle starts

Safety first: No internal work is required; you can perform these checks from the front panel.

Step-by-step checks:

• 1. Confirm regeneration mode: In the programming menu, verify that the Marlo softener is set to time-clock or demand mode as desired, and that regeneration is not disabled.
• 2. Check time and day: Ensure the time-of-day is accurate and that the regeneration time (e.g., 2:00 AM) is set correctly. Verify day-of-week settings if the unit is set for specific days.
• 3. Review meter readings: In demand mode, check totalized flow and remaining capacity. If the meter is not registering flow, the unit will not trigger a demand regeneration.
• 4. Manual test: Initiate a manual regeneration. If the unit will regenerate manually but not automatically, the issue is likely programming or meter-related.

When to replace parts: If programming is correct and the meter is working but automatic regeneration still does not occur, the Marlo control board may have a timer logic fault and require replacement.