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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 does each wire do on a thermostat?
If your thermostat controls your heat, you will have a white wire. 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.
What are the 5 thermostat wires?
5 Wire Thermostat Wiring (Any HVAC Device – Air Conditioners, Heat Pumps, Furnaces, etc.) 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). Black wire for “C” or “Common” wire.
What color is the common wire on a thermostat?
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 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 does S1 and S2 mean on a thermostat?
The S1 and S2 terminals on the Honeywell are for a remote optional sensor. Your Honeywell may have been using the S1 and S2 terminal to determine when to switch from heat pump to gas.
What do the different color wires mean on a thermostat?
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).
Why does my thermostat have 6 wires?
If your system has six wires, it’s because it features second-stage heating, second-stage cooling or heat-pump cooling but not all three. The extra wire signals the additional function to come on. If your system has second-stage heating and cooling as well as a heat pump, then the thermostat needs eight wires, not six.
What are the four wires in a thermostat?
In general, the heating wire (often white), goes into the “W” port, the cooling wire (often yellow), goes into the “Y” port, the wire that sends power from the HVAC system to the thermostat (often red), goes into the “R” port, the fan wire (often green), goes into the “G” port, and the common wire (often blue), which.
What do the letters mean on a thermostat?
Thermostat Terminal Letters Refer to the thermostat manufacturer’s wiring diagram for precise connection information. (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.)Jun 8, 2021.
What is the orange wire on a thermostat?
The Orange Wire The orange thermostat wire links to your heat pump, if you have one. It terminates in your outdoor condenser for reversing valve operation from hot to cold. The orange wire connects to terminal O on your thermostat. The orange wire only applies to homeowners with an air-source heat pump.
Should my thermostat be on E or F?
The thermostat fan operation switch, labeled FUEL SWITCH in the diagram below, is factory-set in the “F” position. This is the correct setting for most systems. The “E” setting will allow the fan to turn on immediately with the heating or cooling in a system where the G terminal is connected.
Can a thermostat wire cause a fire?
The safety commission reports that contact between the thermostat wires and household line voltage can damage the thermostat and cause a fire. There have been eight reports of burn damage to the thermostat causing minor property damages.
Where do the wires go on a Honeywell thermostat?
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. Some thermostats have a jumper switch, some have a metal staple, others may have a plug, and the jumper may also just be a wire connecting the two terminals.
Do I need a jumper from R to RC?
If you have a wire in the R terminal, and no wire in the RC terminal, use the jumper selector switch, the jumper plug, or a small jumper wire to connect the R and Rc terminals. If you have a wire in the R terminal, and another wire (not a jumper) in the RC terminal, you will not need to connect the R and RC terminals.
What is Y1 and Y2 on a thermostat?
Y/Y1 and Y2. In conventional cooling systems, Y/Y1 controls the first stage of cooling and Y2 controls the second stage, which helps cool down the home faster. In heat pump systems, Y1 controls your compressor, which heats and cools your home.
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 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.
What is orange wire used for?
Red or orange wires are often used to provide the secondary phase voltage in a 220-volt application. Always assume that a red or orange wire (in addition to the black wire, which provides the primary phase voltage) is live.
