Schedule conflict
Vaillant vSMART Programming Conflict

vSMART app reports a 'Schedule conflict' or overlapping time periods that prevent proper operation.

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Possible Causes

Overlapping heating and hot water schedules, multiple zones with conflicting priorities, manual overrides not cleared, duplicated time blocks

How to Fix / Troubleshooting

Steps to resolve schedule issues:

  • Review each day: In the app, open the schedule for each day of the week and ensure that time blocks do not overlap and that transitions are logical.
  • Clear overrides: Cancel any manual overrides or boosts that may be locking the system into a particular mode.
  • Standardize times: Use consistent start and end times across days to reduce complexity and potential conflicts.
  • Reset schedule: If the schedule is very complex, use the app's option to reset to default and then re‑enter a simple schedule.

Once conflicts are removed, the error should clear and the system will follow the new schedule.

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Repair Difficulty

Very Easy 1/5
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