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The white wire underneath your thermostat connects to your heating system. It terminates at your air handler or furnace. The white wire connects to terminal W in industry-standard thermostats.
What are the wire colors of a thermostat and their function?
This is the most typical thermostat wiring style, and it applies to systems that regulate both heat and air conditioning. The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).
What color wire gives power to thermostat?
The Y wire is yellow and connects to your air conditioning compressor. The G wire is green and connects to the fan. Rc and Rh: The red wire(s) are the power source for your thermostat. If your thermostat is dedicated to air conditioning only, it will have a red Rc wire.
Are thermostat wires color coded?
The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. 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.
Where does the red and white wire go on a Honeywell thermostat?
The white wire is usually connected to the “W” terminal. The thermostat acts as a switch, like a light switch. The Red to white switch turns on the heat. Red to Green turns on the fan, Red to Yellow turns on the air conditioner.
What are the 4 wires on a thermostat?
4 Wire Thermostat Wiring (Heat Pumps, HVAC) Red wire for power (24V). White wire for heating (connected to W or W1 terminal). Green wire for fans. Blue or yellow wire for cooling (connected to Y).
What does the RH wire do on a thermostat?
What is the Rh wire on the Nest thermostat? The Rh wire is the power input to the heating system of your air conditioning. If the connection is not established, your air conditioning will stop working.
What happens if you wire a thermostat wrong?
Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.
What color wire goes where on a Honeywell thermostat?
Meaning of Wiring Terminal Letters W (white) controls the auxiliary heating elements. Y (yellow) controls the compressor on the cooling system. G (green) controls the fan. C (blue or black) provides a return path to the transformer.
How do you identify thermostat wires?
Look for connectors that have labels that are the same as your thermostat. For instance, you might find labels like R, W, G, Y, C or O/B. You should find wires attached to these connectors that are the same color as the wires that connect to your thermostat.
Does R go to RC or RH?
Here are some general guidelines: An R wire can go into a Nest Learning Thermostat’s Rc or Rh connector. The Nest Thermostat E only has an R connector, which is typically where an R wire would go. These are not jumper wires, and you can insert the Rc wire into the Rc connector and the Rh wire into the Rh connector.
What color is the C wire?
Blue wires are also called “C” wires because they are the Common wire. C wires are necessary for any “smart” thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.
What color is the common wire?
Red, Black, and White are the colors of switch wiring for three-ways. Red and Black are connected to the switches if the White is used for neutral. The White is often referred to as Common, but the colored wires are also used as hot wires.
What is b wire on thermostat?
O, B, O/B: These wires are responsible for switching the changeover valve in a heat pump system. The O wire reverses the valve from heating to cooling, and the B wire switches the valve from cooling to heating.
Is r the same as Rh?
The “R” still indicates it’s a hot wire and terminal connection, and the “H” simply means heating. The RH wire connects to the RH terminal and controls the heating part of the thermostat.
Should RC and RH be connected?
If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc. If you only have a single R wire, then it will only have an R connector, which is the connection you’ll use.
What is the difference between RH and RC thermostat wires?
The RH wire refers to “red heating” which means that this is the connection you need in order to power the heating system of your air conditioning unit. The RC wire, on the other hand, refers to “red cooling”. It’s the same with the RH wire in that it powers the thermostat. For the RC, it powers the cooling system.
Do White-Rodgers thermostats have C wire?
White Rodgers – C-Wire – Thermostats – Heating, Venting & Cooling – The Home Depot.
Why is my White-Rodgers thermostat not working?
Reset your White Rodgers Thermostat You can reset your White-Rodgers thermostat by pressing and holding the down arrow and the time key on the thermostat until the display goes blank. Consult the manual for your White-Rodgers thermostat to know how to reset your model of thermostat.
How do you reset a White-Rodgers thermostat?
Classic 80 & 70 Series White Rodgers Thermostat Press and hold the Up and/or Down arrow and the TIME button at the same time. The display will initially go blank and then reappear. The configuration settings are now reset.
