SO... I picked up a new thermostat today because apparently we needed a new one (the old one is ugly and we're repainting the house, as I was told by my S/O), and based on what I have for heating and cooling the guy at the HVAC place said the new Honeywell he sold me would cover what I needed. I figured it'd be a simple case of swapping wires over, but the wiring labels on the old Sears brand thermostat doesn't match the new one. I have a 2H/1C system, with a gas furnace, and an AC unit with built in heat-pump.
There are two cables coming out of the wall that split into six wires. One that's black and white, and another that's black/white, white, red and green (respectively these are wired to the old thermostat as W2|R and C|Y|"O/B"|G)
I've checked the manual on the new one, and it indicates the following:
C, R, R2 aren't listed in the manual. And I can't find a manual for the old model to tell me what the letter designations mean (I can't even find one online... it's a Sears C387).
Now I know how to install and fix a lot of stuff, electronic and mechanical, but I know absolutely ZERO about heating and cooling systems. The two pictures below are the old thermostat wired up and the new one unwired. The new one also came with a little silver jumper between R/RC.
Anyone know what the heck I'm supposed to do here, or if I was sold the wrong type/model of panel?
Thanks in advance for any help!