Heating does not come on at scheduled times, but works when manually overridden.

Safety first: No electrical risk; this is a configuration issue.

• Check date and time: Ensure the thermostat's clock and day of the week are correct. If available, enable automatic time sync via Wi‑Fi.
• Review schedule: Go through each day and confirm that comfort periods are enabled and set to the desired temperature. Many thermostats have separate weekday/weekend schedules.
• Disable holiday mode: Make sure any holiday, away, or frost-only mode is turned off.
• Test next event: Set a test schedule event a few minutes in the future and observe whether the thermostat changes the setpoint and calls for heat.
• Factory reset if needed: If the schedule seems corrupted or confusing, perform a factory reset and reprogram from scratch.