Thermostat frequently disconnects from Wi‑Fi but then reconnects

Safety: No HVAC power work is required.

Steps to improve stability:

• Improve signal strength: Move the router closer, add a Wi‑Fi extender, or reorient antennas to improve signal at the thermostat.
• Change Wi‑Fi channel: In the router settings, select a less congested 2.4 GHz channel (1, 6, or 11) to reduce interference.
• Disable band steering: If your router automatically moves devices between 2.4 and 5 GHz, disable this feature or create a dedicated 2.4 GHz SSID for the thermostat.
• Ensure adequate ventilation: Make sure the thermostat is not installed over a heat source inside the wall that could overheat the electronics.

When to replace: If other devices are stable on the same network and the Sensi continues to drop offline, the internal Wi‑Fi module may be failing and the thermostat may need replacement.