2 Wire Honeywell Thermostat Wiring Diagram

2 Wire Honeywell Thermostat Wiring Diagram. Our wiring diagrams section details a selection of key wiring diagrams focused around typical sundial s and y plans. Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan. See the diagram below for what each wire controls on your system.

Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan. In a cooling only system the wires go on r and y instead of r and w. It doesn t control cooling and because it s a mechanical thermostat it doesn t need power for internal functions so it has no c wire. Metal jumper for thermostat rc and rh terminals.

On a heat only system one of the wires usually red goes on the r terminal and the other wire usually white goes on the w terminal.

Again referring to the honeywell thermostat ct31a1003 wiring diagram you can see it requires only two wires r and w. Again referring to the honeywell thermostat ct31a1003 wiring diagram you can see it requires only two wires r and w. In a cooling only system the wires go on r and y instead of r and w. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc. A wiring diagram is a simplified traditional photographic representation of an electrical circuit.