6 Wire Thermostat

Heat pump systems with a C-wire and advanced heating and AC require 6 or more wires. For example, a two stage heat pump, one with Aux heat and/or one that has a reversing valve that needs power all require 6 wire thermostat wiring or more (7 and 8 wiring follow).

What is the brown wire for on 6 wire thermostat?

If your thermostat doesn't have a 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.

Does nest work with 6 wires?

Yes you should be able to use any of the Nest thermostats with your setup. Some connections on the Nest wire plate are named differently depending on the particular Nest model, for example there is no R for the Nest learning thermostat, but Rh and Rc, and you would plug into Rh.

How many wires do old thermostats have?

The most basic thermostat has 2 wires; usually a red and a white wire. Two wire thermostat wiring is used for furnaces only and usually doesn't need a “C” or “Common” wire. That's why we only need two wires.

Is RC and C wire the same?

The C and Rc wires are not the same. To install this thermostat you should follow the exact same wiring of the previous thermostat.

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.

Where does brown wire go Honeywell?

A brown wire is run from the second heat source to this terminal. The terminal is used to power the Fan. A green wire is run from the Indoor Blower Fan to this terminal.

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.

Does red wire go to RC or RH?

The RH and the RC wires are actually pretty easy to understand because they're straightforward. 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.

Is R and Rh the same on a thermostat?

Its R for Cooling. Some systems, most oil, need heat and cool powered by different transformers or controls. RH is R for Heating. When used separately W will connect to RH for a call for heat, G will connect to RC when turning the fan on and Y will connect to RC for a call for cool.

What is the difference between RC and RH?

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.

How do I replace an old thermostat with Google Nest?

Let's get started go to your home's breaker box and turn off the switch that controls power to your

Can I use the R wire for the C?

If the black wire on the R terminal goes to the thermostat and only the thermostat, you can safely move it over to the C terminal.

Can I jump RC to C on thermostat?

Yes. You don't need to connect both Rc and Rh at the Ecobee as they are internally jumpered by the thermostat. You can disconnect one of those wires at the control board and move it to C on the control board and C on the Ecobee.

Can smart thermostats ruin your furnace?

Smart Thermostats Can Short-Circuit Old Furnaces If the smart thermostat takes too much it can short-circuit the furnace. Overtime, this can lead to serious damage and even complete failure of the furnace. However, this is almost exclusively a problem for old furnaces.

How many wires should a thermostat have?

FOUR WIRES This is a popular configuration for a battery-powered thermostat or a digital thermostat that solely regulates heat. The standard configuration consists of 24-volt hot (red), 24-volt common (blue), heat (white), and a fan (green).

Can I replace my thermostat with any thermostat?

Most replacement thermostats are compatible with all common systems. However, if your system is unique, finding a replacement thermostat may be difficult.

Can you get electrocuted from thermostat wires?

Virtually all room thermostats operate on low voltage that carries little risk of harmful electric shock.

Do I need a jumper between R and RC?

If you have one wire — even if it's labeled RC — it goes into the R terminal, setting the jumper connecting terminals R and RC in place. Thermostats may have a jumper switch, metal staple, or plug. The jumper may also be a wire connecting the two terminals.

What is brown wire used for?

Brown = Live The brown wire has the function of carrying electricity to the appliance. If the brown wire is live and not connected to the earth or neutral wires there will be a risk of electrocution. You must ensure that there is no power source connected with the live wire before working on the wiring.