Thermostat loses all settings and schedule after a power outage

Safety first: Turn off power to the furnace/air handler before opening any battery compartment.

Steps to preserve settings:

• 1. Check for backup battery: If your Goodman thermostat uses a backup battery, replace it with the correct type and polarity.
• 2. Update firmware: Connect to Wi‑Fi and install any available firmware updates that may address memory issues.
• 3. Reduce power interruptions: Ensure the furnace/air handler breaker is not loose and that there are no frequent nuisance trips.
• 4. Factory reset and reprogram: Perform a factory reset, then re-enter all settings and schedules. Monitor after the next outage.
• 5. Replace thermostat: If settings are still lost after brief outages, the internal memory hardware is likely failing and the thermostat should be replaced.