Thermostat shows 'Calibrating: Heating and Cooling Disabled' for an extended time

Safety: No electrical hazards. Do not remove power during firmware updates.

• Step 1 – Wait 20–30 minutes: Calibration can take several minutes after power is restored or firmware is updated.
• Step 2 – Check for drafts or heat sources: Ensure the thermostat is not in a drafty location or near a heat source that prevents stable readings.
• Step 3 – Reboot if stuck: If calibration persists for more than 30–45 minutes, remove the thermostat from the backplate for 30 seconds and reinstall.
• Step 4 – Replace thermostat if calibration never completes: Persistent calibration may indicate a failed internal sensor; replacement is recommended.