I need some help. I called the gas company and they say that the gas was never actually shut off. So I flipped the valve open and turned the breaker/light switch on to my furnace. When I turn the tstat to heat, nothing comes on. but when I turn the fan on it blows cold air (obviously). So I decided to switch the old tstat out with my honeywell programmable one. I have it set up as it should be, all the color wires are on the correct terminals. Red - R/Rc - power White - W - heat? Yellow - Y - cool? Green - G - fan I know the red is power and the green is fan, but I can't recall which one is heat vs cool. I know it's hooked up correctly according to the directions, though. Blue - unhooked as it was. I apparently have a four wire system, it says on a 5 wire system I'm supposed to unhook the bridge between the R and Rc pins. With and without the bridge I can't get the heat to blow, any suggestions? It's like 38 in my house right now and my hands are still numb from the 20 minute drive. When I opened up the furnace it's on and seems to blow some air, and had a light or whatever on, but no real heat is coming out.