Lefant Scheduling / Timer Malfunction

Robot vacuum’s schedule does not run at the programmed time, but manual start works.

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Possible Causes

Incorrect time or time zone set, Schedule not saved properly in app, Do-not-disturb window overlapping schedule, RTC drift on mainboard

How to Fix / Troubleshooting

Safety: No hardware access is required.

  • Step 1 – Verify time settings: In the Lefant app, confirm the robot’s time and time zone are correct.
  • Step 2 – Check DND settings: Ensure do-not-disturb periods do not overlap with scheduled cleaning times.
  • Step 3 – Recreate schedules: Delete existing schedules and create new ones, then confirm they appear correctly in the app.
  • Step 4 – Firmware update: Update the robot firmware to the latest version.
  • If still failing: The internal clock circuit may be faulty, requiring mainboard replacement.
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Repair Difficulty

Easy 2/5

Required Part

Main Control Board (RTC Circuit)
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