Tech arrived a little early; that’s ok. Tech Installed Honeywell T4 Pro programmable thermostat. Install was without any issues. I am agast at $377!! for the thermostat and installation (even with Alaskan Club membership discount). Tech ran a test of the installation; test was successful, and tech gave me a short programming tutorial. I’ll have to really study the user manual as programming the thermostat is not very intuitive. It is a complicated device.