Question: What Does R And RC Mean On Thermostat?

Do I need a jumper from R to RC?

If your system has both heating and cooling functions, you’ll need to connect both the Rc and Rh terminals with a red wire.

Because many thermostats come with a pre-installed thermostat jumper wire that connects these terminals, you only need one red wire, which could be the thermostat Rc wire or the Rh wire..

What is the difference between R and RC on a thermostat?

Rh stands for Red-Heat and Rc stands for Red-Cool. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat.

What color is RC wire on thermostat?

RedThermostat Wiring Color Code ChartMarkingWire Color CodeDescriptionRcRedPower from cooling, 24 Vac transformerRhRedPower from heat, 24 Vac transformerCBlack/BlueCommon of 24 Vac transformerWWhitePrimary heat cell relay12 more rows

What is RC and RH on a thermostat?

RC: The RC terminal is the 24-volt cooling power supply. RH: The RH terminal is the 24-volt heating power supply. (Note: The RC and RH terminals are jumpered together in a four-wire heat/cool system and a single-stage heat pump system, but not in a five-wire heating/cooling system.)

Why does my thermostat only have 3 wires?

If you have a heat-only system, you may notice that your thermostat has three wires—R, G, and W. In this scenario, the Power Extender Kit (PEK) is not compatible. 1) Run an additional wire to use as a C from the furnace control board to the thermostat. …

Is R and Rh the same?

R , Rh , and Rc are all the same, but not. In general terms, the R terminal is where you connect the signal voltage source. … This allows current to flow from “into” the R terminal and “out of” the appropriate signal terminal ( W , Y , etc.)

Where does RC wire go on nest?

Note: If you have an R, Rc or Rh wire, you can put it into the R connector on the Nest Thermostat. If you have a W2, Y2 or O/B wire, you can put it into the * O/B connector, if needed.

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.

What are the 5 thermostat wires?

Here is the industry standard thermostat wire color code used for most systems:White. The white wire connects to your heat.Yellow. The yellow wire connects to your compressor.Green. The green wire connects to the fan.Orange. This wire connects to your heat pump (if applicable).Red (C). … Red (H). … Blue.

Why is there a jumper between R and RC?

Effectively there isn’t a second RH wire, although there is an RH terminal. However, the heating still needs to be controlled, so a wire known as a jumper is connected between the RC and the RH terminals so that power gets to the heating control part of the 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. … 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 does R and W mean on thermostat?

R wire – heat power. W wire – heat. R wire – heat power. W wire – heat. G wire – fan.

What happens if you wire a thermostat wrong?

Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself. Dual-fuel systems, a poorly located thermostat, whole-home humidifiers, or incorrect wiring can make the installation of a thermostat a longer, more frustrating, and more complicated …

Where does the RC wire go?

If you just have one wire, regardless if it’s labeled RC, it will go into the R terminal, and the jumper connecting terminals R and RC will be in place.

What does W mean on thermostat?

heat loadW=the heat load. On a call for heating the thermostat closes a switch between R and W, sending 24v to energize the heating circuit. … On a call for cooling the thermostat closes a switch between R and Y, sending 24v to energize the cooling circuit. G= the fan load.