Hooking up a new thermostat but old thermostat has a white and a black wire?
Asked Oct 24, 2007, 03:49 PM
Everything I look at indicates a white and red wire for the connecting wires. Our thermostat is probably original to our home (1943). It has two wires. It is difficult to tell but it looks like one is a white wire and the other is black. I've tried looking on the internet for some info however I only see white & red wires mentioned. Should the black wire be connected to the rH terminal and the w connected to the w terminal?