T Stat Wire Colors

T outdoor temperature sensor.

T stat wire colors.

Yellow the yellow wire connects to your compressor. Item 244462 model 64169644. If you don t know your system type place this wire into the w terminal. My old thermostat old mercury honeywell has the following wires.

White the white wire is what connects to the auxiliary heat on your system. If in the previous step you identified an o b or o b wire that s connecting to the o b terminal and have a separate w wire place this wire into the w2 terminal. Rc power for cool rh not connected to rc jumper clip removed rh. This could happen if the wires are swapped on both ends or if there s a spice in the wire.

Rh and rc single power for heat and cool. The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. For example if the red wire is connected to w on the thermostat the furnace should turn on. Or v or vr.

The white wire connects to your heat. Here is the industry standard thermostat wire color code used for most systems. Not used on the 3m 22. Thermostat schematic wire colors.

Southwire 250 ft 18 5 thermostat wire by the roll. The green wire connects to the fan. If you only have 4 wires they are typically red yellow green black. Locate any unconnected wire labeled w or w1.

This wire connects to your heat pump if applicable. The rc wire connects to the cooling system. Furnace thermostat wiring diagram terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. Furthermore for the thermostat wiring colors code for this terminal if equipped consult with the installer.

It also has a bridge from rh to rc another bridge from rc to c and yet another from a second c terminal to the y. Blue to y green to g red to rh and white to w. While there isn t an official standard for thermostat circuit wiring colors there is a general pattern. In most thermostat wiring hookups the red wire is the power source for the system.

Your best bet is to see the manufacturer s documentation both thermostat and hvac. Or r or vr. The most common color i ve seen used for this terminal and wire designation is light blue but this varies and is entirely up to the installer what color to use. So i guess i don t have a real c wire.

The rh wire connects to the heating system. Orange this wire connects to your heat pump if you have one. But i don t see a wire going directly to the c wire. Rh power for heat rh not connected to rc jumper clip removed or 4.

Green the green wire connects to the fan.