Wi-Fi icon on Honeywell Home smart thermostat blinks and app cannot control thermostat

Note: This is a network reliability issue, not an HVAC hardware failure.

• Check signal strength: Stand near the thermostat with a smartphone and check Wi-Fi bars. If the signal is weak, move the router closer or add a Wi-Fi extender.
• Verify network credentials: If you recently changed your Wi-Fi name or password, update the thermostat’s Wi-Fi settings via its menu.
• Reduce interference: Keep the router away from microwaves, cordless phones, and thick metal objects. Change the router’s Wi-Fi channel to a less congested one.
• Reboot router and thermostat: Power cycle the router and then restart the thermostat from its settings menu.
• Update firmware: Use the Honeywell Home / Resideo app to check for and install firmware updates that may improve Wi-Fi stability.