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The limit switch shuts down the furnace burners if the heat exchanger gets too hot, which can crack heat exchanger pipes and ruin the furnace. And when a heat exchanger cracks, deadly carbon monoxide can and will leak from it into the air in your home.
In this guide, we’ll explain how your furnace high limit switch works, how it impacts your home, and solutions for when it malfunctions. Need your limit switch repaired? We can help.
In this article, we’ll dive into what a furnace limit switch is, how it works, and why it’s essential for your furnace’s safety. From understanding its role to recognizing signs of malfunction, we have all the information you need to keep your furnace running safely and efficiently.
The furnace limit switch is an essential component because it prevents your furnace from becoming too warm throughout standard operation. This is a safety feature that is designed to prevent damage to the internal components of your furnace and keep your family safe.
In this episode of Repair and Replace, Vance shows how to replace the high limit switch in a gas furnace. The limit switch is a safety switch that monitors the air passing over the heat...
Are you wondering what a furnace limit switch is and why it's important? A furnace limit switch is a safety device that monitors the temperature within your furnace and turns off the unit if it gets too hot. Learn more about this essential component of your heating system
You can replace the limit switch — a furnace part that controls both comfort and safety — yourself. It's a simple, inexpensive part that attaches with just a few screws, and it's easy to identify. Learn more about what this part does and how to replace it.
The limit switch is located under the supply plenum in your furnace. Its sole job is to read the temperature of that plenum and wait until it hits the appropriate temperature. When the plenum hits that temperature, the limit switch lets the air handler know that it can run, delivering the warm air that you want into your home.
The furnace high-limit switch is essential for turning on and off domestic heating systems, especially as a safety precaution when the furnace temperature hits dangerous levels. This high-limit switch typically connects to the temperature sensor for the blower motor, effectively serving two important purposes:
Also known as the fan limit switch or simply the limit switch, it has two functions in the furnace's operation: It turns the fan on and off during the normal heating cycles of the furnace, and it senses heat and shuts down the furnace if the interior temperature gets too high.