Thermostat frequently disconnects from Honeywell Home / Resideo cloud (app shows offline)

Note: This affects remote control but not local HVAC operation.

• Stabilize internet: Ensure your modem and router are not rebooting frequently. Replace failing network hardware.
• Check router firewall: Allow outbound connections for the thermostat. Avoid overly restrictive firewall rules or parental controls on the thermostat’s IP.
• Assign static DHCP lease: In your router, reserve a fixed IP address for the thermostat to reduce connection drops.
• Update firmware: Use the Honeywell Home app to check for and install firmware updates.
• Relocate router: Improve Wi‑Fi signal at the thermostat by moving the router or adding an extender.