Key Ways to Tell If You Need to Replace Your Furnace – Part One

As the winter season approaches, it’s essential to ensure that your furnace is in good working condition. A faulty furnace can not only lead to discomfort in your home but also pose a safety risk for you and your loved ones. Therefore, it’s crucial to know when it’s time to replace your furnace. In this article, we will discuss some of the telltale signs that indicate your furnace needs replacing. By paying attention to these signs, you can avoid unexpected breakdowns and stay warm and comfortable throughout the cold season.

1 – You Are Dealing with Frequent Furnace Repairs

If you find yourself calling for furnace repairs every few months, it may be a sign that your furnace is nearing the end of its lifespan. Frequent repairs can become costly, and the money spent on these repairs could instead go towards a new, more efficient furnace. It’s essential to weigh the cost of repairs against the cost of a new furnace to determine which is the better investment.

It’s time to replace your furnace if it’s experiencing frequent breakdowns or requiring costly repairs. As furnaces age, they become more prone to breakdowns and may require more frequent repairs to keep them running. If you’ve had to repair your furnace multiple times in the past year, or if the cost of repairs is starting to add up, it may be more cost-effective to replace your furnace instead of continuing to repair it.

2 – Your Furnace Is Over 15 Years Old

The average lifespan of a furnace is between 15-20 years. If your furnace is approaching or exceeding this age range, it may be time to consider a replacement. Older furnaces are less efficient and may not be able to keep up with your heating needs, leading to increased energy bills and discomfort in your home. In addition, older furnaces may be more prone to breakdowns and require more frequent repairs, which can be costly and inconvenient.

3 – Your Energy Bills Are Increasing

If you notice a sudden increase in your energy bills, it could be a sign that your furnace is no longer operating efficiently. As furnaces age, they become less efficient, leading to increased energy consumption and higher bills. A new, energy-efficient furnace can help you save money on your energy bills and keep your home comfortable.

4 – Your Furnace Is Making Strange Noises

If your furnace is making strange noises, such as banging, rattling or whistling, it could be a sign of serious problems. These noises could indicate issues with the blower, ductwork, or other components of the furnace. If left unchecked, these problems could lead to more significant issues and even a complete breakdown.


Recognizing the signs that indicate a furnace replacement is necessary can save homeowners from costly repairs and potential safety hazards. The age of the furnace, unusual noises, rising energy bills, and inadequate heating are all indicators that it may be time for a replacement. It is important to have a professional HVAC technician assess the furnace to determine the best course of action. By staying vigilant and addressing any issues promptly, homeowners can ensure their homes remain comfortable and safe during the colder months. Look out for the second installment to this two-part post to learn more about the signs that point to a furnace replacement.

If you need furnace maintenance or repair, contact Legacy Heating. We are proud to specialize in HVAC systems for residential new home construction (RNC) and installation and replacement of furnaces, air conditioners, air cleaners, thermostats, humidifiers, and many other HVAC products.

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