A man holds a baby's hand while walking across a floor as teaching the baby to walk.

Just about any electrical appliance has the potential to overheat. Furnaces are no exception. As a homeowner, you need to take precautions to lower the risk of an overheated unit. You should also be wary of the associated symptoms, so you know when to take action. Remember, if your system gets too hot, you should keep a cool head and get your furnace taken care of right away.

We want to keep our customers in the know about overheating furnaces. Our team here at Trouth Air Conditioning compiled the following information for you.

How Do I Prevent My Furnace From Overheating?

The main way to keep your furnace from overheating is ensuring correct airflow. Hindered airflow causes the system’s components to work abnormally hard, causing them to overheat.

Here’s how to keep your appliance in check:

• Get a correctly-sized filter.
Not every filter is created equal. Some filters create a resistance your system isn’t designed to handle. Be sure to read the manufacturer’s recommendations on correct filters, and consult an HVAC expert if you’re still not sure.

• Change/clean your filter routinely.
If you let the dust settle for too long, your filter can become clogged. This clog significantly compromises airflow, which causes the machine’s parts to overwork and eventually fail. Check the manufacturer’s manual to see how frequently you need to change your filter.

• Be sure your vents/ducts aren’t blocked.
Blockages in your vents are hard on your furnace, causing the equipment to run for too long. Be sure to clear away any obstructions near and/or on them, including carpets, furniture, and curtains. Additionally, keep your ducts clean and free of any leaks or constrictions.

• Have a technician perform routine maintenance.
Regular maintenance, annually or semiannually, is a necessary step in protecting the condition of your appliance. Your technician will clean any dirty coils, fasten loose components, and be sure the system is performing optimally. This will significantly lower the risk of a malfunction.

How Do I Know My Furnace Is Overheating?

When your furnace overheats, it loses some or all of its functionality. Therefore, it probably won’t go unnoticed. Here are some giveaway signs:

• Your furnace shuts down before completing a cycle.
This is the most common sign of overheating. It actually shuts down to protect you. When your heat exchanger gets to an unsafe temperature, the high-limit switch detects this and automatically turns the furnace off.

• You smell a burning scent.
If you’ve just turned on your furnace for the first time in a while, you can expect a slight burning smell for about 20 to 30 minutes. However, a constant burning smell is serious cause for concern. Call one of our professional technicians immediately.

• You notice an unusual humming sound.
A loud humming noise likely means your motor is overworked and about to give out. In this case, you should immediately turn your furnace off (if it doesn’t turn off on its own first). Then call one of our experts immediately.

What Should I Do if My Furnace Overheats?

If your furnace overheats, it’s in your best interest to have it repaired right away. Delaying could end up costing you more in the future with pricy parts or whole-system replacements. If you suspect your furnace has overheated, call us at Trouth Air Conditioning and Sheet Metal today at 337-527-8683. We’re proud to provide efficient and long-lasting repairs to our neighbors in Sulphur, LA, and surrounding regions

Need HVAC Service?

Contact the experts!


Trouth Air Conditioning provides professional air conditioning, heating, indoor air quality, sheet metal services and more to businesses and residents in Lake Charles, Sulphur, Westlake, Moss Bluff, Bell City, Cameron, DeQuincy, Grand Lake, Hackberry, Iowa, Kinder, Orange, Starks, Vinton, Welsh, and surrounding Louisiana communities. Visit our service area page to learn more about how we can service you. Contact us today at 337-527-8683 or request service online.