Table of Contents
What color wire goes where 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).
What happens if thermostat is wired 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.
How do you wire a 3 wire thermostat?
Here is how to wire a 3 wire thermostat: Remove the control panel of the old thermostat. Take a picture of the 3 wires. Remove the motherboard of the old thermostat completely, and secure the wires. Put the new motherboard in the place of the old one, and pull the wires through the 3 wire thermostat.
What wires go where on a thermostat?
Thermostat Wiring Tips The W wire is connected to your heating system. 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 is the common wire on a thermostat?
WHAT IS A C-WIRE? A C-wire, or a common wire, runs from your low voltage heating system (24v) and carries continuous power to your thermostat. In today’s electric market, most newer heating and cooling systems have C-wires, which guarantees compatibility for the installation of all smart thermostats.
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.
What is the OB wire?
A wire labeled O, B, or O/B is used to control whether a heat pump is in heating or cooling mode. However, on some thermostats, a wire labeled B is the common wire C.
What if my thermostat only has 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. There are three options available to create a C wire and make the ecobee compatible.
What are the three wires in a 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 Jul 31, 2012.
Can you join thermostat wire?
3 Answers. A butt splice connector, or twist-on wire connector would be fine. Just make sure you use connectors that are designed for the size, and number of wires being connected. Technically, you should probably either pull all new wiring, so that it’s continuous from HVAC to thermostat.
How do you move a thermostat wire?
Here’s how to move a thermostat: Turn off the power to the thermostat at the breakers. Remove the interface and disconnect the wires. Remove the back panel from the wall. Drill a hole in the new location. Set the back panel. Pull the wires through the drilled hole. Connect the wires to the thermostat’s interface.
What are push in wire connectors?
Push in connectors are a new style of connector, meaning that you can simply strip a minimal amount of insulation from the wire before inserting it into one of the holes in the connector. Once in place, the wire is permanently locked into place.
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.
How do you connect 4 wires to 2 wires?
The first option is to use the black wire of the 12-3 cable as the hot wire. Connect the black wires of both cables together, and connect the common white wires together. Cap the red wire and leave it untouched in the junction box. Place plastic twist caps on all splices.
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 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.
