Ecobee internal R/Rc jumper issue.
Install Ecobee thermostat. Worked half a hour and then went black screen. Put back old one and still didn’t work. Checked the fuse of furnace board. It was blown so I replaced it.
Now with old thermostat heater is working but cooling is not. Also fan on is not working. Any clue?
I suspect something with this internal jumper.
u/Altruistic-Exam-100 — 5 days ago