Thermostat frequently disconnects from the app or shows as offline

Safety first: Network changes do not involve mains wiring.

• Relocate Heat Hub: Place the hub in an open area, away from metal enclosures, thick walls, and other wireless equipment.
• Reduce interference: Move cordless phones, baby monitors, and Wi‑Fi repeaters away from the hub and thermostat.
• Add repeaters: Additional Wiser devices (e.g. smart radiator thermostats) can strengthen the Zigbee mesh between distant rooms and the hub.
• Check router load: Reboot the router and ensure it is not overloaded with too many devices. Consider separating 2.4 GHz and 5 GHz networks.
• Firmware updates: Keep the Heat Hub and thermostats updated to the latest firmware for improved connectivity.