Thermostat frequently disconnects from Wi‑Fi or app shows it offline intermittently

Safety first: No electrical work on HVAC equipment is needed.

Steps to troubleshoot:

• 1. Check signal strength: On the thermostat or app, view Wi‑Fi signal strength. If low, move the router closer or add a Wi‑Fi extender.
• 2. Change Wi‑Fi channel: Log into your router and switch to a less congested 2.4 GHz channel (e.g., 1, 6, or 11).
• 3. Disable router power-saving: Turn off aggressive power-saving or client isolation features that may drop idle devices.
• 4. Reserve IP address: Set a DHCP reservation for the thermostat's MAC address to prevent IP conflicts.
• 5. Update firmware: Ensure the thermostat firmware and router firmware are up to date.

When to call a professional: Persistent dropouts with good signal may indicate a failing Wi‑Fi module; contact Resideo support for replacement options.