I have 3 questions.
1. Who put the "G" sticker on?
2. Can I get a clear second picture so I can see what it says.
3. Do you have a continuity and/or multi-meter
1. I put those stickers on, by matching to the terminals that they are in of the current thermostat.
2. Going to bw difficult, whoever installed my unit wasnt the brightest and put the panel on the far side of the unit. I would need to climb over the unit which is in a tight crawlspace. I can tell you what each terminal is labeled if thay helps: top left - "c" top right "r", bottom middle "g".
3. Sorry dont know what those are.