5 Wire Thermostat Color Code

Red for the common hot side of the heating transformer. And in heat pump systems the white wire starts the compressor in heating mode.

The thermostat wire is color coded so the technician can identity which wire goes to which port on each board.

You can find out more Diagram below

5 wire thermostat color code. The 5 universal base colors for thermostat wires which are in order of frequency of use red white green yellow and black. Yellow wire y cooling wire. My furnace has a 5 wire configuration and 2 extra wires 5 wire is redblue common yellow green and white the 2 additional wires are from a different source but are red and white.

Upgrading from a 4 wire thermostat to a 5 wire thermostat duration. The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above. W heat white wire.

Therefore taking the time to learn all of the possible combinations of wires and colors is essential to keeping the family safe. The above is a typical wiring diagram of a nest thermostat with 4 wires. These colors are used as follows.

Its 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. The picture above depeicts the typical wiring color code for a 4 wire thermostat. The common and red from the 5 wire source are not showing power on a volt meter.

Thermostat wiring and wire color chart thermostat wiring colors code. It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. Failure to properly link these can lead to failures in the system including short circuits which can lead to fires.

Common honeywell thermostat wiring color code. Thermostat wiring to a furnace and ac unit. Interpreting thermostat wire colors.

Opens the valve turns on the ignitor and fires up the burners in the furnace. Color of wire and termination. These color codes are vitally important in connecting the right wires to the corresponding terminals.

White wire w heating wire. In electric heating furnaces this lead turns on the heating elements. In gas systems this triggers the lighting process.

The basic heat ac system thermostat typically utilizes only 5 terminals. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable. Color code how it works diagram.

R the r terminal is the power. I am installing a honeywell eim and it is not powering on. This is commonly found in standard hvac systems that use an air conditioner and a furnace.

Red wire rh power. Ac service tech llc 15788 views. Color codes for 24v thermostat wires are divided into two groups.