Guide to wiring connections for room thermostats. inspectapedia.com
Is this 2 or 3 wire thermostat setup? . Thermostatic Controls - Is this 2 or 3 wire thermostat setup? - I want to install a new thermostat and some state they require a 3 wire, and some a "C" wire, and some say a "2 wire" www.doityourself.com
