Do You Know The Signs Of An Overheating Furnace?

image of a gas furnace

If you’re noticing oddities with your furnace, don’t brush them off as trivial. These could be symptoms of a more dangerous issue, such as an overheating furnace. It’s important to act fast and contact an HVAC contractor to schedule a furnace service before the problem gets worse. In this article, we discuss what to look for, the causes, and typical solutions for an overheating furnace.

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Top Signs Your Furnace Is Overheating

An overheating furnace can be a serious threat to your safety and the safety of your family. It can increase the risk of carbon monoxide poisoning and leave you vulnerable to harsh winter weather. Fortunately, the signs of an overheating furnace are easy to spot if you’re paying attention. Here are some things to watch out for:

A Persistent Burning Smell Coming From Your Furnace

image of a homeowner plugging nose due to a burning furnace odor

If you notice a burning aroma near your furnace, it could be a sign of excessive heat causing damage to the system’s components. If the smell disappears quickly, it may just be burning dust after a period of inactivity. However, if it persists for more than 30 minutes, it’s important to take it seriously and contact an HVAC technician. The excess heat may be damaging components, and wires may even start to melt.

An Unusual Humming Noise Coming From Your Furnace

While furnaces do make noise, if you notice any strange or louder noises, it could be a sign that the system is working too hard and components are starting to malfunction. If you hear clacks or bangs, it’s important to investigate further and consider contacting an HVAC technician. These noises could indicate that the motor is under strain and components are starting to fail.

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A Sudden Heating System Shutdown

If your furnace’s built-in safety sensors detect excessive heat, they will trigger an automatic shutdown to protect the system. This should give the system time to cool down and restart. However, if the problem persists, the shutdown will continue to repeat until the underlying cause is addressed. If you notice this happening, it’s important to inform your HVAC contractor and get guidance.

Common Causes of an Overheating Furnace

An overheating furnace doesn’t happen by chance. It occurs when specific conditions are present. The problem can escalate over time. Each cause has its corresponding solution. Some common causes of an overheating furnace include:

Restricted HVAC Airflow

image of a dirty furnace filter

Hot air from the furnace moves through the filter and across the ducts to different rooms in your home. Any obstructions in the path can restrict airflow. This can cause heat to build up in the system with no way to escape. If the temperature exceeds the furnace’s maximum operating temperature, you may start to notice the symptoms of an overheating furnace.

A Dirty Heating System Interior

Contaminants in the air can settle on the surfaces of internal components over time. Some components are more affected by dirt than others. For example, as the blower motor spins the fan blades, it generates heat. If the motor is dirty, it won’t be able to cool down effectively. The furnace coils can also have trouble transferring heat if they are coated in grime.

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Furnace Short Cycling

Short cycling is the process in which an HVAC system quickly starts and stops, preventing it from completing a cycle and functioning properly. This can wear out motors and other components and cause stress on the system. In new systems, short cycling is often caused by a size mismatch. In older systems, it may be due to thermostat malfunction or furnace overheating.

Lack of Heating System Maintenance

Mechanical components are prone to wear and tear, and if one of these parts fails, it can cause your heating system to overheat. For example, if a fan blower short circuits, the result can be reduced circulation and rising internal temperatures. With regular HVAC maintenance, technicians can identify failing components and replace them before they cause further problems.


End of Furnace Service Life

If your furnace is reaching the end of its service life, it may be experiencing more failing components and hidden flaws. Continuously replacing these components and dealing with increased fuel consumption may not be cost-effective. In this case, it may be worth considering getting a new furnace instead of hanging onto your old heating system.

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How an HVAC Contractor Fixes an Overheating Furnace

If you suspect your furnace is overheating, contact a trained HVAC technician to check it. It can be dangerous for someone inexperienced to try to fix a furnace. To ensure your safety, turn off the power and call for emergency repairs. HVAC technicians can provide a quick and accurate diagnosis and offer viable solutions.

How Long Does a Furnace Last?

On average, a furnace should last for about 15 years. However, proper maintenance can extend its lifespan, while neglecting maintenance can lead to premature failure. If you’re unsure whether to repair or replace an old furnace, it’s a good idea to compare the costs. While quick and cheap component replacements are tolerable, expensive repairs may not be worth it. If the cost of repairs exceeds half the price of a new furnace, it may be more cost-effective to choose a system replacement. This can offer higher energy efficiency and lower heating costs, as well as fewer headaches.


The Importance of Annual Furnace Maintenance

As a homeowner, you can perform simple maintenance tasks like replacing the air filter and removing clutter from around the furnace. For more complex tasks, it’s a good idea to schedule annual furnace maintenance with an HVAC contractor. This involves a thorough inspection and tune-up of the system. Professional furnace maintenance can prevent many issues, improve efficiency, enhance performance, and extend the lifespan of your furnace.

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If your furnace is overheating, it’s important to address the issue as soon as possible to avoid expensive damage to the system and dangerous carbon monoxide emissions. If you notice your furnace shutting down, a burning smell, or loud noises, it’s a good idea to call an HVAC contractor. They can verify the problem and fix it quickly using specialized tools and available parts. With their help, your household can return to normal in no time. Don’t let your furnace overheat for extended periods — take action and seek professional assistance to ensure the safety and efficiency of your heating system.

Call Miller Oil Company For All of Your HVAC Requirements

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In the greater Hartford County, Connecticut, area, Miller Oil Company provides top-notch heating and cooling services. Our team is made up of the most qualified certified professionals who can offer you quality HVAC tune-ups, repairs, installs, and replacements. Each of our technicians is equipped with the skills and training needed to properly maintain your HVAC system.

The lowest local heating and cooling service prices are guaranteed by Miller Oil Company. Our maintenance services can raise your energy efficiency, increase your comfort, and lower your cooling expenditures. In the event that you want an HVAC repair or replacement, we can suggest the ideal system for your house while respecting your budget. To ensure your pleasure, all of our work is backed with a guarantee. Call Miller Oil Company right away to make a service appointment. We also provide no-cost in-home estimates. Give us a call today, and we will be happy to answer any questions you might have.

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