Get to Know Your Limit Switch | Kitchener ON

The more you know about your heating system in Murfreesboro, the easier it will be to notice when there’s an issue to fix. There are many components that allow your furnace to operate properly, and one of them is your limit switch. The first thing you should know about your heating system’s limit switch is where to find it. Knowing what it does and how it works also makes it easier to notice when it’s malfunctioning, so you can let your heating experts know that there’s a problem. Read on for a lesson in furnace anatomy and get to know your limit switch.

Knowing How to Find It

It’s hard to understand how your heating system works if you don’t have any idea how the different parts come together. Furnaces aren’t all that difficult to understand, and it can help the heating experts if you know how to tell if each part is functioning correctly. If you want to find your limit switch, look for a temperature sensor on a mounting plate. The mounting plate is attached to the outside of the furnace and has several wire terminals for the fan and gas valve. The temperature sensing probe goes through the wall of the furnace housing. You can usually find the limit switch above the heat exchanger in the hot-air supply plenum.

Understanding What It Does

Now that you know where your limit switch is, you should know what it’s responsible for. The limit switch works in conjunction with the blower fan. You don’t want to start circulating air as soon as you turn the furnace on because the air won’t be warm yet. The limit switch is what tells the blower to turn on once the system is hot enough. Then the air is blown through the heat exchanger and throughout the house.

Recognizing Signs of a Problem

If your blower fan doesn’t turn off, your limit switch could be the problem. Sometimes a malfunctioning limit switch will put your heating system out of commission entirely. In this case you should talk to your heating experts for assistance.