Signs Your Furnace May Be Going Out

Close,up,of,air,conditioning,repair,,repairman,fixing,air,conditioningThe cold winter months can be brutal, especially if your furnace isn’t functioning optimally. It’s essential to pay attention to any signs that your furnace may be on its way out, as a malfunctioning furnace can not only leave you uncomfortable but also pose safety risks. In this blog post, we’ll discuss some common signs that indicate your furnace may be going out, helping you address the issue before it becomes a major problem.

1. Inconsistent Heating

If you notice that certain areas of your home are noticeably colder than others, or if you find yourself constantly adjusting the thermostat to maintain a comfortable temperature, it could be a sign that your furnace is starting to fail. A faltering furnace may struggle to distribute heat evenly throughout your home, resulting in cold spots and discomfort. Don’t ignore these temperature inconsistencies, as they could indicate underlying issues with your furnace that need attention.

2. Unusual Noises

While it’s normal for your furnace to make some noise when it kicks on or shuts off, excessively loud or uncommon noises could be a sign of trouble. Banging, rattling, grinding, or squealing sounds coming from your furnace should never be ignored. These noises could indicate loose or damaged parts, a worn-out motor, or even a cracked heat exchanger. It’s crucial to address these issues promptly to prevent further damage and ensure the longevity of your furnace.

3. Increased Energy Bills

If you’ve noticed a significant spike in your energy bills without any corresponding increase in usage, it’s worth investigating whether your furnace is to blame. When a furnace starts to malfunction or becomes inefficient, it often requires more energy to operate properly. This increased energy consumption can lead to higher heating costs. Keep an eye on your energy bills and look for patterns of unexplained increases. If your bills are consistently higher than usual, it may be time to have your furnace inspected.

4. Frequent Repairs

Have you found yourself calling a technician for furnace repairs more often than you’d like? Frequent breakdowns and repairs are a clear sign that your furnace is struggling and may be nearing the end of its lifespan. While routine maintenance and occasional repairs are normal, an aging furnace that requires constant attention can be a significant inconvenience and drain on your finances. In such cases, it’s worth considering the cost-effectiveness of continuous repairs versus investing in a new, more reliable furnace.

5. Yellow or Flickering Pilot Light

If your furnace operates on natural gas, pay close attention to the color and stability of the pilot light. A healthy pilot light should burn blue, indicating that it is receiving the right balance of oxygen and gas. A yellow or flickering pilot light could signify a potentially dangerous situation, such as a gas leak or carbon monoxide imbalance. Carbon monoxide is a colorless and odorless gas that can be extremely harmful, even fatal, if not detected and addressed promptly. If you notice a yellow or flickering pilot light, turn off your furnace immediately and contact a qualified technician to assess the situation.

6. Age of the Furnace

Lastly, the age of your furnace is an essential factor to consider. On average, furnaces have a lifespan of around 15 to 20 years. If your furnace is approaching or has exceeded this age range, it’s more likely to experience issues and deteriorate in performance. Even if you haven’t noticed any specific signs of trouble, it may be wise to proactively replace your aging furnace before it fails entirely. Regular maintenance can help extend the life of your furnace, but eventually, the wear and tear will take its toll.


It’s important not to overlook any signs that your furnace may be going out. Inconsistent heating, unusual noises, increased energy bills, frequent repairs, a yellow or flickering pilot light, and the age of your furnace are all indicators that something may be wrong. If you observe any of these signs, it’s advisable to contact a professional HVAC technician to evaluate your furnace’s condition and recommend the appropriate steps to keep your home warm and safe throughout the winter months.

Got Questions? Let Us Help!

Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.