Thermostat shows E10 and will not connect to Wi‑Fi; remote control via Wyze app fails.

Safety first: No high-voltage work is required, but avoid removing the thermostat while HVAC is running.

• Check Wi‑Fi network: Confirm your router is broadcasting a 2.4 GHz network (Wyze thermostats typically do not support 5 GHz only). Ensure the network is up and other devices can connect.
• Move router or add extender: If the thermostat is far from the router, move the router closer or add a Wi‑Fi extender to improve signal strength at the thermostat location.
• Re-enter Wi‑Fi credentials: In the Wyze app, go to the thermostat settings and re-run the Wi‑Fi setup, carefully entering the correct SSID and password.
• Reboot router and thermostat: Power cycle your router and modem, then remove and reattach the thermostat display to reboot its Wi‑Fi module.
• Check router settings: Ensure MAC filtering is disabled or that the thermostat’s MAC address is allowed. Disable any overly aggressive firewall settings that might block IoT devices.
• Replace thermostat if Wi‑Fi radio failed: If E10 persists and other devices connect fine, the internal Wi‑Fi module may be defective and the thermostat display may need replacement.