I have force air (propane furnace). I would like to upgrade to a new "smart" thermostat, but they didn't run a C (common) wire which is required for most of these units to run properly.
I do however, notice that there is a Y wire, which from my understanding is used to switch on an air conditioning compressor (which I don't have).
Since I don't have one (nor do I plan on getting one anytime in the foreseeable future), is there any reason why I couldn't just move Y over to C? Seems like I should be able too, but I just wanted to make sure that it won't somehow screw with the furnace control to not have it hooked in.
Here's a picture of the furnace board:
(on a side note, does anyone have any idea why there are also stranded wires going into R & W?!)