I have had the same problem for two that have worked fine until last 6
months. It is making me CRAZY! Like you, i have done everything they
tell you to do.. over and over... I'm about to rip them out and they are
only two years old.
I have reset 2 thermostats, checked power to it, reset wifi, works one
minute and doesn't the next. They are only a year old.. no reason.
Wired.. so not battery. What's the deal... Time to buy another brand?