PDA

View Full Version : Changing old 2 wire thermostat black and red wires to new digital


gimewen
Jul 8, 2013, 01:57 PM
My old thermostat has 2 wires - a black and a red and the thermostat has no markings at the connections. The connection for the new one has 2 connections labeled Y and G. What new connection is for the black wire and which for the red one?