Thermostat language, time, or date settings will not save or revert after power loss.

Safety first: No high-voltage work is required.

Steps to troubleshoot:

• 1. Stabilize power: Ensure the indoor unit breaker is not tripping and that the thermostat has a solid C-wire connection.
• 2. Firmware update: Connect to Wi‑Fi and update thermostat firmware to the latest version.
• 3. Factory reset: Perform a factory reset and reconfigure all settings, then monitor whether they are retained.
• 4. Replace thermostat: If settings still do not save, the internal memory is likely failing and the thermostat should be replaced.