For heating, it turns the furnace on when the temperature falls too low, and for cooling, it turns on the AC when the temp gets too high. In this guide, we will take a look at how thermostats works, check nasa spacecraft 3d marker pdf out some new digital, programmable. There is normally a temperature slider bar for setting the desired temperature which affects the position of the coil and contact points for that temperature. Newer digital thermostats use thermistors (thermal resistors) to detect changes in temperature, and hence have no moving mechanical parts. If you are shopping for a new thermostat, check out m to get started with some ideas. They have a "Help Me Find a thermostat" section that walks you through the options, depending on the type of heating system you have, what kind of electrical. Two simple arrow buttons allow you to adjust your desired temp up or down, and a basic switch lets you select between heat, AC, or fan - that's it. The FocusPRO is the next model up, with a larger display screen but the same basic. When it comes to heating and cooling your home, the oft over-looked thermostat is the silent gatekeeper that keeps your home or office at the temperature you want. The concept of the thermostat is pretty simple - you tell it what temperature you want to. Emerson 70 Series Single Stage Programmable Thermostat 1F78-151 Emerson 70 Series Single Stage Programmable Thermostat 1F78-151 View Details.