The Wyze T-Stat installation video shows C-wire adapter installed (magnetized on the furnace). The adapter input has 5 wires including a C-wire that connects to the existing furnace wire terminals. The four existing wires from existing T-Stat connect to the C-wire adapter output. After this, the video shows the existing wires at the wall and all of a sudden a Fifth Blue Wire (the C-wire) shows up coming out of the Wall…!!! How that wire got there…!!!
Also, the C-wire provides continuous 24 volt power to the thermostat… Why then the thermostat cannot be Always-On on the screen…?!