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W, W1, W2: Just like the Y wire, the W wire(s) control the heating aspect of your system. O, B, O/B: These wires are responsible for switching the changeover valve in a heat pump system. The O wire reverses the valve from heating to cooling, and the B wire switches the valve from cooling to heating.
29 Αυγ 2022 · It can be W-O/B, O/B, W-O, W-B, or even separate O and B wires. If you have separate O and B wires, tape off the B wire so it doesn’t make contact and connect the O wire to the O/B terminal. If your O or B terminal shares a label with another wire — typically W —identify whether you have a heat pump system or not.
1 Ιουν 2015 · E: Emergency heat (In emergency mode "Y" is not energized and E is energized to indicate the need for emergency heat. This mode is used if the heat pump fails during cold winter temperatures and the compressor must remain off.)
We will cover the most common thermostat wirings for 2 wire, 3 wire, 4 wire, and 5 wire thermostats. At every stage, we will point out what 2 wire or 5 wire thermostats are used to wire, for example, to get a bigger picture of where those color wires go and how they enable the functions of air conditioners and furnaces.
19 Ιουν 2024 · The C wire, also known as the common wire, is usually black but can be blue or any other color than the commonly used red (R), white (W), green (G), yellow (Y), or orange (O/B) wires. The C-wire is responsible for providing a continuous power supply from the HVAC system to your thermostat.
26 Μαΐ 2023 · This complete 24-volt thermostat wiring guide covers all thermostat wiring issues from the simple to the complex – from basic 2 wire thermostat wiring common to gas furnaces all the way to 8 wire thermostat wiring for two stage heat pumps and similar HVAC systems.
You’ll need to check your current thermostat’s wires to tell if your system is Nest thermostat compatible, and which thermostat models it will work with. Usually, you just remove your...
