Matchless Honeywell Thermostat Wiring Colors

Electrical wiring question replacing honeywell t6160 room stat mains 3 wire with horstmann drt2 battery operated 2 wire.

Honeywell thermostat wiring colors. White w heat signal. If you have a c wire place it into the c terminal on your wall plate. But here is a list of the most common wire color to function mappings as seen in many four and five wire t stat setups.

Honeywell thermostats normally have four colored wires in their configuration. Additionally the common sometimes black should come from the common side of the transformer. Replacing a thermostat can be tricky because of the variety of colors of the electrical wiring used for to control the unit.

The yellow wires connect to the y terminals on your thermostat. This could happen if the wires are swapped on both ends or if there s a spice in the wire somewhere that was not matched up to the correct color. The red wire should always come from the hot side of the 24 volt transformer.

In some cases one of those wires may be your common. Electrical wiring for a honeywell thermostat. We recommend to always work with the labels instead of colors but they do go missing much more frequently than colors of the wires.

This wire will go to the g terminal on your new thermostat. Therefore here s the color to label diagram for a typical thermostat. Red r power for the thermostat.

The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. More about thermostat wiring. It s important to note that in some cases the color of the wire does not necessarily mean it connects to that came color one the board.