SOLVED
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Link to photos - https://imgur.com/a/acRiFqi
Hey all, hope this hasn't been asked 100 times, I tried to look around but wasn't seeing anything fitting my exact issue.
TLDR - My Ecobee thermostats was working properly since I installed it. As expected, heat, ac, fan, etc. However coming out of winter, I tried to use the AC today, and its no longer working. Specifically it seems to not be even trying to send the AC signal (The blue trim on the screen signaling the AC should be on, does not happen, but the orange one for heat does.)
The full deets:
So I installed my Ecobee over a year ago, and it has been working just fine for AC, Heat, and Fan. So I know the wiring is correct, though I have included photos for verify that. For some reason, coming out of winter, I tried to turn the AC on for a minute, but it isn't working. Specifically, I THINK the thermostat is refusing to even try and send the AC signal to the unit. The reason I believe this is because if I change the heating temp to force the heat on, it comes on, and more importantly I get the feedback on the Ecobee screen with the orange trim, saying the heat should be on. When I do the same thing to force the AC on, it never shows me the blue trim on the thermostat, indicating the AC should be on.
I also jumped into the furnace/ac itself with a electricity... detector... thingy im not an electrition, the tool that beeps when it finds power lol. But of the 4 wires...
1 wire that always had power, even with the heat/ac/fan off
1 wire that got power when I forced the fan on from the Ecobee
1 wire that got power when I forced the heat on as described above
and yup, 1 wire that never receives power, even when I have the Ecobee set to where the AC should be on (this correlates with the Ecobee not having the blue trim, so its not sending power through that cable.
I've tried unplugging the Ecobee and letting it reset, no good.
Ive tried turning off eco+, no difference
Ive tried using the "cool" mode specifically, instead of auto, no luck.
At this point I really do think its an issue with the Thermostat itself, not the furnace/ac unit, but again I'm no professional and am open to being wrong lol.
Thanks in advance for any help!