I'm installing a wifi-capable thermostat in my house which for obvious reasons requires a C wire. The old school mercury thermostat I'm replacing didnt have a C wire connected but I've checked the furnace schematic and connections and the C is there.
Can someone please take a look at the attachments and verify that the C wire exists / that I'm not losing my mind?
Here are some additional pics: http://m.imgur.com/gallery/u1QJQ
It looks like I should be able to add the unused blue wire to the C terminal on the furnace. Thoughts?
I've been referencing this post: How can I add a "C" wire to my thermostat?