I'm looking to install the Ecobee3 Lite thermostat. My current thermostat has a blue C wire running to it, so my understanding is the PEK doesn't help because that is used if you have no C wire.
On my furnace side, the C wire is unused, so I'm trying to figure out where I need to connect it because I do not have a typical control board that everything conveniently plugs into.
Wires not held in my hand are what is coming from the thermostat with the C wire wrapped around the other wires.
The wire being held (I'm assuming it goes out to the AC unit) connects a small white wire to the yellow wire of the thermostat. It then connects a small red wire from the AC to a larger brown wire that goes into the unit.
Based on the schematic, the Brown wire is listed as connecting to the C wire going into the unit, so does that mean I can have the C wire from the thermostat, the R wire from the AC and the brown wire connected in the same cap? Would this give me the power I need to go to my thermostat?
Here's a picture of what everything goes into. I saw on another post that the C wire can also connect to the ground wire?