Welcome! Here are the website rules, as well as some tips for using this forum.
Yep, didn't mark wires before disconnecting from old thermostat. Blue wire to B, Orange to O, and so on and so forth doesn't work...nothing happens. I saw somewhere where you should be able to figure it out by looking at the wires on the furnace but that confused me more...2 white wires, a red and yellow attached to Y, for example. Picture of wires to furnace and new thermostat posted. Please help!