Quick Answer: What Is RC And RH On Thermostat?

Why is there a jumper between RH 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..

What if there is no C wire for thermostat?

If your current thermostat didn’t need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall.

What color is the C wire?

BlueThese are the most common colors and the labels used for thermostat wires: Blue or Black – C – The common wire. Red – R – 24 VAC power from the transformer in your furnace.

Should RC and RH be connected?

The RC wire (C for Cooling), if connected properly, controls your HVAC cooling. The RH wire (H for Heating) provides power to your HVAC heating. If you are planning to replace your home thermostat, it will be essential that you know which wires to connect to the right terminals in your thermostat.

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 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 does W mean on a 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. Y= the cool load. 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.

Does Honeywell t9 need C wire?

The T9 requires a C-Wire which is common in most newer homes. On Honeywell Home’s site, there is a compatibility checker for you to see if the Honeywell Home T9 will work with your home’s system. … You need to go to your boiler or AC unit and locate the wiring. On most HVAC systems, the wires are labeled.

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.

What color wires go on a Nest thermostat?

If you’re thermostat doesn’t have separate connector labeled C and you’re not sure what type of system you have: A brown wire is mostly likely a heat pump wire and should be connected to the O/B connector on the Nest thermostat. If the B wire is blue, it should most likely be connected to the C connector.

Do I use RH or RC on Nest thermostat?

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. Tip: Keep your old thermostat, any jumper wires and a picture of how the wires were originally connected.

Do I need a jumper from R to RC?

If you notice a short jumper wire between RH and RC terminal, you will need to leave the jumper installed on the Wiser Air back plate located in the lower right hand corner ( no jumper wire required). In most cases, the heating and cooling system share a single transformer.

Is r the same as Rh?

R , Rh , and Rc are all the same, but not. In general terms, the R terminal is where you connect the signal voltage source. … One of the legs from the secondary of the transformer will be connected to the R terminal, which applies a voltage to the terminal.

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 red wire on thermostat?

Most thermostats have a Red wire that is the power wire that usually connects to R & RC terminals of the thermostat, a Green wire that energizes the Fan relay, connected to the “G” terminal on the thermostat, a Yellow wire that energizes the outdoor unit’s contactor, (if you have air conditioning) and a white wire that …

Does red wire go to RC or RH?

The RED wire or 24 Vac power lead is connected straight to the RC & 4 terminals. Some thermostat units have a dedicated R terminal and it jumpers to the RC, RH or 4 terminals internally. The W, Y and G terminals should be pretty straight forward on most all types of thermostat’s.

Is RC the same as C wire?

Though it is a common notion, it may be incorrect to state that the C-wire powers the thermostat. Typically, the wires that give the power supply (usually termed as the ‘hot’ wires) are marked Rc (for cooling) and Rh (for heating). … ‘ If your system has a common wire, it will be marked ‘C’ at most times.