That’s why the newer digital thermostats consume energy even when the furnace or air conditioner is not running. Thermostat Red Wire (“R” or “Rc” Wire) We will learn what each color wire means. Understanding color coding will give you a good understanding of how the thermostat actually functions. You can’t go ahead with thermostat wiring without removing the control panel. Essentially, the removal of the thermostat control panel exposes the wires and grants you access to them. Thankfully, the removal is not a complicated task. The first thing to do is to turn off the thermostat. Then, you can go ahead with removing the control panel.

The thermostat is not programmable but will automatically turn off when the desired temperature is reached This thermostat is very simple to use, you just have to connect the thermostat to your Wi-Fi network and then you can access the web interface through your computer or smartphone. Use your photo and/or the notes you’ve taken to connect the properly colored wire to the correct terminal on the thermostat. Note that only 24-volt wiring is covered: We do not cover 110/240-volt thermostat wiring and millivolt thermostat wiring issues. Now, let’s talk about other wires you may encounter in the process of thermostat wiring. Some of them include AUX C, AUX NC, and AUX NO. The AUX wires are used for auxiliary heating. Other wires include BK, ODT1, ODT2, RS1, and RS2. How to Remove Thermostat Control PanelYou will need to replace the thermostat wiring if your new HVAC system is of a different type (24V replacing a 110V system, for example) or the wiring bundle doesn’t have enough wires to support the new system’s upgraded performance capacity (two-stage replacing a single-stage system, for example).

Do you find it complicated to set schedules on the smart thermostats? Honeywell has developed these non-programmable heat-only two-wire thermostats depicting a modern yet simple look. It’s much easier to control this thermostat— especially for those who find it difficult to control smart functionalities. The Google Nest Thermostat (Gen 3) is a very impressive product that offers an easy way to monitor your home’s heating and cooling needs.Remove the motherboard of the old 2 wire thermostat and put the new 2 wire thermostat in its place. Do keep in mind that with so many different thermostats, each wire code can have a different color wire. “O” wire, for example, is not necessarily always orange. If a technician that installed your thermostat used a different color, you might have a problem reconnecting the wires. That’s why this next section is so important: Removing The Old Thermostat (Take Photo) The first step in thermostat wiring is actually getting to the wires. You probably have your thermostat mounted on the wall. Exposing the wires is easy; it starts with removing the thermostat’s control panel. To prevent these two scenarios, make sure to spread the wires. Take each wire and bend it outwards. Here’s the logic behind this: The most common type of 2-wire HVAC system is a forced air system. In a forced air system, the furnace blows heated air through ducts in the house and into rooms. The blower fan in the furnace is usually controlled by a thermostat. When the room reaches the desired temperature, the thermostat turns off the blower fan. A forced air system can also include a central air conditioner. List of two-wire smart thermostats and Specification Specification