Not much to it really. Does what it says on the box. Although, it loses its temperature settings occasionally and I have not been able to work out why. The display is still operational when this happens. Remove the motherboard of the old thermostat completely, and secure the wires. You don’t want them to hide deep inside the wall.

To reconnect the wire, simply put the wire on the right terminal and tighten down the set screw. Pull a wire a bit to make sure the wire is properly fixed. 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. Batteries difficult - only likes very low powered ones which are hard to find. Otherwise good product. Now you start reconnecting the wire by wire. Having a photo of the old thermostat is very helpful here. There are two ways of how to know where each wire goes:Next, let’s talk about the C or common wire. If you have a Trane model thermostat and a wire labeled X or B, refer to your thermostat manual. In some cases, one of those wires is your common. If you have a C wire, place it into the C terminal on your wall plate. C wire adapters are available here. Reconnect the 4 wires to the appropriate terminals – red to R, white to W or W1, green to G, and blue or yellow to Y – and screw them in place. Pull each wire to make sure that it’s fixed in place. In addition to heating (2 wire thermostats) and C or fan (3 wire thermostats), 4 wire thermostats include the cooling wire, usually in blue or yellow color. Here are the wires in 4 wire thermostats with terminal codes and color codes (also referred to as 4 wire thermostat wiring color code): There are several solutions to your problem. Some might just want to install a new 6 or 8 wire thermostat wire to your thermostat. (the proper but usually more difficult way) This might mean relocating your thermostat. Or they might bring a product like the one that you have, to wirelessly connect the thermostat to the furnace, and then use the builder installed 2 wires to power the thermostat.

Before we take the flathead screw to unscrew these, let’s first familiarize ourselves with the crucial part of any thermostat wiring: Wire codes and colors.These boilers require a mains voltage thermostat, which can have 2 or 3 wires. The boiler will have a terminal which activates the boiler when mains voltage is applied to it, typically labelled SL or Switched Line. 2 wire thermostat Put the new motherboard in the place of the old one, and pull the wires through the 3 wire thermostat. Most control panels can be removed just by nudging it from below or above a bit. Some Honeywell thermostats can have some screws as well; just unscrew them to expose the wire terminals. What if there is no C wire for the thermostat?” (Older thermostat; you can leave it without or add it)

W2 is designated for two-stage heating. Most heat pumps include second-stage heating and require the white W2 wire. Orange Wire For O And Dark Blue Wire For B (“O/B” Wire) We will learn what each color wire means. Understanding color coding will give you a good understanding of how the thermostat actually functions. 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. This is a 2 wire thermostat wiring color code: wire thermostats have a bit more flexibility. Smart thermostats like Nest and Ecobee thermostats require 4 wire thermostat wiring to function properly. The Nest thermostat is quite different than other thermostats as it doesn’t rely on sensors to tell you when it’s cold or hot. Instead, it works by analyzing how much heat the space is retaining.If you have properly reconnected the 2 wires, the new 2 wire thermostat should control the furnace in the same way your old 2 wire thermostat did. 3 Wire Thermostat Wiring (Boilers, Heaters) If your thermostat doesn’t look exactly like this, or even anything like this, don’t worry. We just need to get a grip of what each color wire is and what it does. To protect your equipment, turn off the power at the breaker box or switch that controls your heating and cooling. To confirm your system is off, change the temperature on your existing thermostat, so the system starts heating or cooling. If you don’t hear or feel the system turn on within 5 minutes, the power is off. You can skip this step if you have a digital thermostat with a blank display. Take a picture of the 3 wires. Note the color – red, white, and green – and the terminals – R, W or W1, G. You should typically see an 18-gauge solid core wire. The most common configuration is five wires. However, you could see as few as two and many as ten.