Even when you live in Las Vegas and enjoy warm weather 9 months out of the year, it is important that you have a well working furnace that is ready to keep you warm those three months you need it. With a furnace, there are several things that can go wrong. There are certain safety measures that have been placed in furnaces to keep your home safe from some of the potential dangers that come with furnace malfunctions. One of them is the limit switch. Air Supply Heating & Air Conditioning is here to talk about what a furnace limit switch is and what you can do when you have a problem with yours.

How Does a Furnace Limit Switch Work?

The furnace limit switch located in your furnace is there to keep your furnace from overheating. It measures the temperature of your furnace while it is on and will shut off it the furnace reaches a dangerous temperature. It has the ability to shut the burner off anytime there are unsafe temperature levels met. It is incredibly helpful in ensuring your home isn’t at risk of a potential fire hazard should the furnace run into a problem that leads to dangerously high temperatures. To the name eye, it is a long metal tube that is connected to the side of the unit. Inside this tube, there is a metallic strip that is made up of two different types of metals that bend as the air gets warmer. If the temperature is too high, this strip bends enough that it makes contact with the two contacts connected to the limit switch which will shut off power to the furnace.

How Can You Tell if a Limit Switch is Bad?

There are definitely times where the limit switch runs into issues. These switches can malfunction at times and it is important to understand what could be going on as you try to get it fixed. Here are some common problems that we see with furnace limit switches:
– Incorrect Wiring: There is no way around it, if your furnace limit switch hasn’t been wired properly, there are going to be major issues when trying to run your furnace.
– Dirty Switch Contacts: As your furnace ages, it is normal for the limit switch to get dirty or experience some corrosion. This can cause malfunctioning.
– Blown Fuse: If the limit switch malfunctions, it can cause a blown fuse that will need to be replaced.
– Recalibration: If you find yourself repairing your furnace limit switch, there is a good chance that it will need to be recalibrated.

Central Forced Air Furnace Heating Diagnosis, Repair, Replacement, Maintenance & More in Summerlin, North LV, Henderson, Centennial, Enterprise, Lone Mountain Village, Paradise, Sunrise Manor, Spring Valley, Aliante, Desert Shores, Eldorado, Peccole Ranch, Silverado Ranch, Tuscany Village, Whitney, Winchester & Las Vegas Nevada

If you are having issues with your furnace limit switch or any other furnace issues, you can turn to Air Supply Heating & Air Conditioning to get to the bottom of the problem and fix it. We want to make sure you’re warm this winter. Call us today!