I have had a Honeywell Wi-Fi Thermostat (RTH6580WF) for a number of years now. Within the past 6 months, I purchased a Nighthawk R6400. Since then, i always get "Connection Failure" on my thermostat; despite doing numerous resets.
Today, I decided to fire up my phone's hotspot and try to register the thermostat through that wireless SSID and it worked like a charm. That leads me to believe there's something not configured correctly on the router itself.
Has anyone else seen this and could you offer a solution?
