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I purchased an Ecobee3 thermostat and when I installed the unit, I noticed that I had an extra blue wire. My old thermostat was powered by batteries so I figured the blue wire was my common wire but that it was not connected to the panel.
Based on Ecobee's instructions, I realized that I needed to use the PEK or connect the blue wire to the C terminal on my panel. I opened the blower unit and I found a panel but it's unlike anything I've seen online and it does not have the traditional WYGRC terminals, etc. I also noticed a bundle of wires outside of the blower until that appear to be my thermostat wires but I am unsure how to proceed.
I created a gallery on Imgur - imgur.com/gallery/XtsKL/new
The last image shows the thermostat wire connected to others wires that run back inside the panel. I'd like to know one of two things:
1) Where to connect the blue wire so it can function as my common wire
2) How to connect the PEK to this mess
Thanks for reading this and I'm hoping someone here can help me.