I installed my thermostat before winter and it worked fine for heating. It’s warmed up here and the
AC isn’t kicking on. I’m attaching my original thermostat wiring and the wyze wiring that works for heat.
I live in a condo where the building controls when the heat and ac are active, but I confirmed they switched to AC on Monday.
Without knowing how their system works, I cant be of much help. The old thermostat had both a B and O wire- this usually means that B is the common wire, but they might be doing something weird like connecting your unit to 2 different systems. A normal heatpump is switched from heat to cool mode when the B/O wire is energized/not energized, it’s not something that your building management has any control over.
So I have access but its such a pain to get to, it’s in the ceiling above the shower. I was double checking the wiring up there and looks like the O wire is nearly shorted out. Could this be the issue? I’m going to rewire that and give it a shot with the old thermostat again.
I think replacing that wire fixed it, at least I’m getting cold air on the old thermostat. I’m going to let the condo cool down a bit and then switch out the wyze thermostat.
I’m guessing when I was up there the first time that wire was almost shot and messing with it completely shorted it out. From what speadie was saying the O is used to flip the system from heat to ac so that would make sense.