I'm in the midst of restoring a '79 Coleman Rebel (and, yes, this is also my first pop up). I have a factory installed heater/furnace. The original thermastat looks like it was kicked (cover missing, things are a bit munged). Can I use a standard thermastat from Home Depot? I have found a couple (the standard economy and then a battery powered digital - leaning towards the digital: http://www.homedepot.com/p/Honeywell-1-Week-Programmable-Thermostat-RTH221B/202216462 ). The voltage rating is 24v. What does that mean in regards to the coleman heater/furnace? This isn't related to the 12v that a battery would put out, would it? If I did install, would I need to only operate if I was plugged in? Both wires are yellow. There was no label on the wires, nor on the thermastat (on the back or at the terminal connections). How can I tell what is what? The thermastat is expecting Y, R, G, W... Any pointers, or reference that I can read up on? Thank you!!!