A:AnswerYou may end up buying and installing C Wire Adapter for Thermostats 24 Volt Transformer Compatible with Nest Honeywell Ecobee Emerson Sensi Smart Wifi Thermostat . And no its not to simple. Best buy won't tell you that nor Honeywell. Go to you tube and watch how to install it. If you already have 24v C wire the it should take you about 15 minutes max. If you don't about 1 to 3 hours
A:AnswerIt should, o and b are your reversing valve for the heat pump, however I did not see anything about a c, for the best operation it should have c hooked up as well. It actually wont work without the c wire.
A:AnswerHave you checked the wires at the unit itself? Make sure that the C wire is connected on the c terminal at the unit. I had this same problem and found that this was the issue.
A:AnswerNo bridge or Hub is required. Once installed, follow directions that come with it and you will be able to control it from your smart phone or tablet.