Safety: No mains work required.

Signal strength: Use your phone near the thermostat location to check Wi‑Fi signal. If weak, move the router closer or install a Wi‑Fi extender.
Change channel: Log into your router and change the 2.4 GHz channel to a less congested one (1, 6, or 11).
Disable power saving: Turn off aggressive power-saving or "smart connect" features that may disconnect IoT devices.
Update firmware: Ensure the thermostat firmware is up to date via the app.

Persistent dropouts despite strong signal may indicate a faulty Wi‑Fi module; consider replacing the thermostat.

Thermostat frequently disconnects from Wi‑Fi and goes offline in the app

Possible Causes