Thermostat Replacement Question


DDS

New Member
I’ve spent hours searching the web and watching videos and finally found one that showed my actual analog thermostat (Coleman-Mach) being replaced by my new digital programmable thermostat (Honeywell RTH2300B). Perfect! Then I pop the old one off the wall and I have two wires coming into the old thermostat (instead of one) and they change colors as well. Not perfect!

My plan is to only utilize the high fan speed for our AC, so no added switch required. Would one of you kind folks please help with with what color wires I should attach to each section of the new thermostat? Pics below...

Thanks so much!

Derek

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