Thermostat does not follow programmed schedule; heating turns on or off at unexpected times.

Safety first: No electrical risk for schedule changes.

• Verify date and time: Check that the thermostat clock and day of week are correct. Correct them if needed.
• Review schedule: In the thermostat or Tydom app, review each time period for each day. Remove overlapping or conflicting periods.
• Cancel overrides: Ensure any temporary manual override or holiday mode is cancelled so the schedule can resume.
• Sync with gateway: If using Tydom, force a sync by saving the schedule again from the app.

If the thermostat still ignores the schedule, there may be a firmware or memory issue requiring professional evaluation.