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5 Common Fall HVAC Problems and How to Fix Them

August 21st, 2024 | 4 min read

By Daphne Hunt

As fall approaches, you might start noticing that your HVAC system isn’t performing as well as it should, leaving you worried about staying warm as the temperatures drop. It’s frustrating to think about potential issues like strange noises, weak airflow, or uneven heating disrupting your home’s comfort. 

Fall brings a unique set of challenges, and if your HVAC system isn’t properly prepared, it could lead to uncomfortable days and higher energy bills.

With over 16 years of experience helping homeowners like you, we know exactly what to look for when it comes to common HVAC problems in the fall. In this article, we’ll break down the most frequent issues and give you practical advice on how to keep your system running smoothly, so you can enjoy a worry-free season.

1. Clogged Air Filters

A man holds up a dirty air filter straight from the HVAC system.

One of the most common HVAC issues during the fall is clogged air filters. Over the summer, your system likely worked hard to keep your home cool, and in doing so, the filters accumulated dust, dirt, and other airborne particles. When the seasons change and you switch from cooling to heating, those dirty filters can restrict airflow, making your system work harder than necessary.

Why Does This Matter?

A clogged filter can reduce the efficiency of your HVAC system by up to 15%, leading to uneven heating and higher energy bills. The U.S. Department of Energy estimates that replacing a dirty filter with a clean one can lower your air conditioner's energy consumption by 5% to 15%.

It can also decrease indoor air quality, which can be especially problematic if anyone in your household suffers from allergies or respiratory issues.

What You Can Do

Check and replace your air filters regularly, especially before switching your system to heating mode. A&E’s Comfort Club Maintenance Program makes this part easy – let us handle your filter replacement schedule with a 15% discount so you can focus on what really matters.

2. Thermostat Malfunctions

A pile of coins sits on an HVAC home thermostat, indicating that it's causing high utility bills.

Thermostats are the brain of your HVAC system, controlling when and how your system operates. As temperatures fluctuate during the fall, thermostat malfunctions can become more noticeable. Whether it’s due to old batteries, outdated settings, or calibration issues, a malfunctioning thermostat can lead to uncomfortable indoor temperatures.

Why Does This Matter?

If your thermostat isn’t working properly, it can cause your HVAC system to short cycle, meaning it turns on and off more frequently than necessary. This can reduce the system's efficiency by up to 30% and increase energy consumption. For example, if your system is supposed to run for 15-20 minutes but instead cycles every 5-10 minutes, it never reaches optimal efficiency, leading to higher energy costs.

According to the U.S. Department of Energy, poor thermostat operation can also increase heating and cooling bills by about 10-20% annually. If your thermostat is misreading the temperature or failing to maintain the set point, it can cause the HVAC system to run longer than necessary, wasting significant amounts of energy.

What You Can Do

Make sure to replace your thermostat batteries regularly, and consider upgrading to a programmable or smart thermostat that allows you to set specific temperatures for different times of the day. This can enhance comfort and improve energy efficiency.

3. Ignition or Pilot Control Problems

A man in red overalls carries a toolbox of residential HVAC repair tools.

For homes with older heating systems, ignition and pilot control problems are common issues as the weather cools down. These components are responsible for starting the heating process, and if they fail, your furnace may not produce any heat at all.

Why Does This Matter?

Without a functioning ignition or pilot light, your home could be left without heat when you need it most. This not only affects your comfort but could also lead to emergency repair costs that typically range between $150 and $500, depending on the severity of the issue and your location. In some cases, more extensive repairs could cost upwards of $1,000 if parts like the thermocouple or gas valve need replacement.

What You Can Do

If you notice your furnace struggling to start or stay on, it’s important to call a professional HVAC technician to inspect and repair the ignition system. With over 16 years of experience, our technicians at A&E understand how important thorough, regular maintenance is in order to prevent these issues from occurring in the first place.

4. Dirty or Blocked Ductwork

A man stands on a step ladder to clean a residential home's HVAC duct work.

As you switch from cooling to heating, it's crucial to ensure that your ductwork is clean and free of obstructions. Over time, dust, debris, and even pests can accumulate in your ducts, reducing airflow and forcing your system to work harder to distribute heat throughout your home.

Why Does This Matter?

Blocked ductwork can have a serious impact on your home’s overall comfort and efficiency. For instance, blockages or leaks in the ductwork can reduce your HVAC system's efficiency by as much as 20-30%, leading to significantly higher energy bills as your system struggles to maintain the desired temperature. 

This inefficiency also causes uneven heating, with temperature variations of 3-5 degrees Fahrenheit or more between different areas of your home. Beyond comfort and costs, blocked ducts can circulate dust, mold, and other allergens throughout your living space, potentially worsening indoor air quality. 

In fact, the EPA estimates that indoor air pollution levels can be 2-5 times higher than outdoor levels, largely due to contaminants spread through compromised ductwork. 

What You Can Do

A&E offers professional duct cleaning services to remove any buildup and ensure that your system can distribute heat effectively and efficiently. 

5. Furnace Wear and Tear

A man checks the health of an HVAC home furnace with a screen.

After months of sitting idle, your furnace might develop issues when it’s time to start up again. Parts like belts, motors, and bearings can wear out over time, especially if your system hasn’t been maintained regularly. This can lead to noises, reduced efficiency, or even complete system failure.

Why Does This Matter?

A furnace that isn’t operating properly can lead to inconsistent heating and higher energy bills. In severe cases, it could also pose safety risks, such as carbon monoxide leaks.

What You Can Do

Regular fall maintenance is essential to catch and address any wear and tear before it becomes a bigger problem. Our expert HVAC technicians at A&E Plumbing, Heating and Air can inspect, clean, and tune up your system to ensure it’s ready for the colder months.

Preparing for Fall with Proactive HVAC Care

As you’ve read through this article, you probably realized just how much your comfort and energy efficiency can be impacted by these common HVAC issues during the fall. From clogged filters to blocked ductwork, these problems can cause uneven heating, higher energy bills, and even compromise your indoor air quality.

With over 16 years of experience, we specialize in identifying and resolving these HVAC problems before they become costly and uncomfortable disruptions in your home. We’re here to guide you through the necessary steps to ensure your HVAC system is operating at its best.

Take action by scheduling your fall maintenance check today. This proactive approach will help you avoid unexpected breakdowns and keep your home cozy throughout the colder months ahead.

 

Daphne Hunt

Daphne Hunt, an avid writer with a Bachelor’s Degree in English and Mass Communication, thrives on crafting articles and fiction from her quiet home in The Dalles, Oregon, where she lives with her partner and three kids.