Help with installing new thermostat on old home (No C wire) . Thermostatic Controls - Help with installing new thermostat on old home (No C wire) - [ATTACH=CONFIG]6129[/ATTACH][ATTACH=CONFIG]6130[/ATTACH] Hi y'all, I recently bought a house in St. Louis built www.doityourself.com
What Is Thermostat C Wire And What Color Is It Usually? . Buying a thermostat that needs C wire? Not sure whether your HVAC system has the Common wire? The best thing to do if there is no C-Wire is to... smarthomelab.net
