I upgraded my ST-2E to the NCM-300 and followed the diagram at
When I test the board everything works fine, heat and fan run, a/c works no problem.
Once I hook up the Ecobee4 things start misbehaving. I have been on tech support with them and they say my wiring is correct.
The Ecobee4 will run correctly until the room is at the desired temperature after a system reset.
The problem seems to be when the Ecobee4 tries to maintain the temperature or I ask to increase the temperature, it thinks the furnace is on but it's not.
When I look at the system board, there is usually one or sometimes 2 of the red LEDs on and no heat or fan running.
1st question is are the 2 LEDS a sign of a problem? 2nd question is this board compatible with the Ecobee4?
Anyone have similar problems?
Post your questions and comments here.
2 posts • Page 1 of 1