T Stat Wire Colors

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.

T stat wire colors.

Item 244462 model 64169644. Or r or vr. But i don t see a wire going directly to the c wire. Orange this wire connects to your heat pump if you have one.

The yellow wire connects to your compressor. Not used on the 3m 22. This wire connects to your heat pump if applicable. Locate any unconnected wire labeled w or w1.

The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. 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. Blue to y green to g red to rh and white to w. The green wire connects to the fan.

If you don t know your system type place this wire into the w terminal. Green the green wire connects to the fan. Or v or vr. The rc wire connects to the cooling system.

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. Yellow the yellow wire connects to your compressor. 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.

Rh power for heat rh not connected to rc jumper clip removed or 4. Furthermore for the thermostat wiring colors code for this terminal if equipped consult with the installer. My old thermostat old mercury honeywell has the following wires. White the white wire is what connects to the auxiliary heat on your system.

Thermostat schematic wire colors. While there isn t an official standard for thermostat circuit wiring colors there is a general pattern. The rh wire connects to the heating system. T outdoor temperature sensor.

Your best bet is to see the manufacturer s documentation both thermostat and hvac. Southwire 250 ft 18 5 thermostat wire by the roll. Here is the industry standard thermostat wire color code used for most systems. The white wire connects to your heat.

So i guess i don t have a real c wire. 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. In most thermostat wiring hookups the red wire is the power source for the system. If you have a heat pump system place it into the o b terminal.

Rh and rc single power for heat and cool.