I have a Google Nest (6 wires labeled Y, C, W, G, R, OB). I'm replacing
a Honeywell T8034N1007 that works perfectly and has spots for 7 wires
(B, O, W, R, Rc, G, W). The switch on the Honeywell is down to select
"E" instead of "F". There are 5 wires ...