Thermostat shows E6 and cannot connect to Goodman cloud/app services

Safety first: No electrical work is required. Do not open the thermostat housing.

Steps to resolve E6 connectivity error:

• 1. Verify local Wi‑Fi: Confirm the thermostat shows a strong Wi‑Fi signal and that other devices on the same network have internet access.
• 2. Check Goodman app login: Log out of the Goodman smart thermostat app and log back in. Ensure you are using the correct account associated with the thermostat.
• 3. Update firmware: From the thermostat menu or app, check for firmware updates and apply any available updates. Do not interrupt power during the update.
• 4. Router firewall settings: Ensure your router is not blocking outbound connections for the thermostat. Disable overly strict parental controls or firewall rules temporarily to test.
• 5. Wait and retry: If Goodman cloud services are temporarily unavailable, E6 may clear on its own. Wait 30–60 minutes and retry connection.
• 6. Re-register device: Remove the thermostat from your Goodman account in the app, then re-add it using the pairing or registration process described in the thermostat manual.