Installed the Nest Thermostat using Y, R, W, G, & B as common or OB.
Same colors in same configuration on furnace. Set thermostat to Heat and
picked temp. Both furnace and AC come on at same time. Single stage
furnace.
Not sure how to add photo. On thee we furnace main board. Red to red.
Green to green. Yellow to yellow. Whit to white. Blue to common (c).
There is an additional 2-wire cable, red and white. Red to yellow
terminal. White to common (c).
