What Causes Your Furnace to Break Down? Understanding the Inner Workings of Your Heating System


Winter has arrived, and it's time to crank up the heat and get cozy in your home. However, what happens when your furnace breaks down and you're stuck in the cold? A broken furnace is not only inconvenient, but it can also be dangerous for your health if you don't address the issue. In this blog post, we'll explore the common causes of furnace breakdowns and how to prevent them.

Dirty Air Filters

One of the most common causes of a furnace breakdown is dirty air filters. Air filters need to be changed regularly, especially if you have pets or allergies. Dirty filters block airflow, causing your furnace to work harder and eventually overheat. The best way to avoid this problem is to change your air filters regularly and invest in high-quality filters that catch more dirt and debris.

Ignition Problems

Another common cause of furnace breakdowns is ignition problems. Your furnace may fail to start because the ignition system is malfunctioning or damaged. The most common ignition types are pilot lights, electronic ignitions, or hot surface igniters. If you notice that your furnace isn't starting, it's important to call a professional HVAC technician to diagnose the issue and make the necessary repairs.

Faulty Thermostats

Your thermostat is the brains behind your furnace. When the thermostat is faulty, your furnace won't be able to receive instructions, causing it to shut off or fail to start. The most common thermostat problems are wiring issues, dead batteries, and faulty sensors. It's important to check and replace your thermostat battery if your furnace isn't responding to temperature changes.

Overworked Furnace

Your furnace works hard to keep your home warm, especially during the winter months. An overworked furnace may eventually break down because of excessive use, old age, or lack of maintenance. It's crucial to keep your furnace well-maintained annually to ensure it lasts longer and runs smoothly. Regular maintenance includes cleaning and lubricating the moving parts, inspecting and tightening electrical connections, and verifying the efficiency and functionality of all components.

Lack of Airflow

If your furnace is not generating adequate heat or is frequently shutting off, it may be due to insufficient airflow throughout your home. Proper airflow is essential to the efficiency of your furnace, and if it's limited, your furnace may work harder to keep up. The best way to increase airflow is to open vents and ducts, clean out air registers, and ensure your home's insulation is adequate.

A broken furnace is one of the most inconvenient things that can happen during the winter months. Understanding the common causes of furnace breakdowns can help you be proactive in preventing them from happening. Regular maintenance can go a long way in keeping your furnace running smoothly and efficiently. Remember to always consult a professional HVAC technician to diagnose and repair any issues with your heating system. Contact a company that offers furnace repair services to learn more.


27 December 2023

furnace repairs - do it yourself?

Can furnace repairs be made by the average DIYer? If you know a little about what you are doing, is it possible to avoid the expense of having a professional come out to take care of any problems that you are having? My blog is all about furnace safety and repair. You will learn a few things that you can do on your own and advice for when to call in the professional repair technician to assist with the repairs. By the time you reach the end, you will have a better understanding of what you can and should not do on your own.