Maintaining your HVAC system might not be the most exciting household task, but it’s one of the most important. Regular maintenance keeps your system running efficiently, reduces the chances of unexpected breakdowns, and helps you save money on energy bills. But even well-intentioned homeowners can make mistakes that end up doing more harm than good.

In this post, we’ll cover seven common HVAC maintenance mistakes and, more importantly, how to avoid them. 

1. Forgetting to Change Air Filters

Changing your air filters is one of the simplest yet most important tasks in HVAC maintenance, but it’s also one of the most commonly overlooked. Dirty or clogged filters restrict airflow and force your system to work harder to heat or cool your home. Over time, this added strain can lead to higher energy bills and even premature wear on your system.

Air filters should be replaced every 1-3 months, depending on factors like how often you use your system, if you have pets, or if anyone in your household has allergies. A clean filter keeps your system running and improves indoor air quality by reducing dust and allergens circulating throughout your home.

2. Ignoring Strange Noises or Odors

When your HVAC system starts making unusual noises or emitting odd smells, it’s easy to shrug it off and hope the problem will resolve itself. However, these are often early warning signs of bigger issues. A banging or rattling noise could mean loose parts or a failing motor, while a burning smell might indicate an electrical problem. Musty odors, on the other hand, could signal mold growth in your system.

Ignoring these symptoms won’t make them go away—in fact, it usually makes the problem worse. Addressing strange noises or smells as soon as you notice them can save you from more costly repairs down the line. If you’re not sure what’s causing the issue, calling a professional is always the safest option.

3. Skipping Seasonal Maintenance

Seasonal tune-ups might seem unnecessary when your system is working fine, but skipping them can lead to bigger problems later. These check-ups catch small issues before they turn into big ones while also making sure your system is ready to handle the demands of the upcoming season.

For example, a spring tune-up prepares your AC for summer, while a fall inspection gets your heating system ready for winter. When you skip these regular maintenance visits, your system can lose efficiency over time, leading to higher energy bills and increased wear and tear. Scheduling professional maintenance twice a year is one of the best ways to extend your system’s life and keep it running smoothly.

4. Blocking or Obstructing Vents

But blocking air vents can have a bigger impact than you think. When furniture, curtains, or other objects obstruct vents, it restricts airflow and forces your HVAC system to work harder to maintain your set temperature. This makes your system less efficient and can lead to uneven heating or cooling throughout your home.

Keeping vents clear and unblocked helps with airflow, which is essential for your system’s performance. Take a walk through your home and double-check that all vents are open and free from obstructions. Even small changes, like moving a piece of furniture a few inches, can make a noticeable difference.

5. Attempting DIY Repairs Without Proper Knowledge

When your HVAC system isn’t working, it might be tempting to try fixing it yourself. While some tasks, like changing air filters or cleaning around the outdoor unit, are safe for homeowners, more complex issues should always be left to the professionals. Attempting DIY repairs without the right tools or expertise can make the problem worse and pose serious safety risks, especially when dealing with electrical components or refrigerants.

HVAC systems are complex, and even small mistakes can lead to bigger, more expensive repairs down the line. It’s almost always best to call a licensed technician who can diagnose and fix the issue safely and effectively.

6. Neglecting the Outdoor Unit

Your outdoor unit plays a crucial role in your HVAC system’s performance, but it’s often overlooked during maintenance. Leaves, dirt, and debris can accumulate around the unit and block airflow, which reduces efficiency. Over time, this can lead to overheating or strain on the system.

To keep your outdoor unit running smoothly, make sure to regularly clear away debris and trim back any vegetation within two feet of the unit. It’s also a good idea to check the condition of the coils and have them professionally cleaned during seasonal maintenance. 

7. Not Having a Maintenance Plan

Relying on a “fix it when it breaks” mindset might seem like a way to save money, but neglecting regular maintenance can actually cost you more in the long run. Without a structured maintenance plan, it’s easy to miss important tasks like cleaning coils, inspecting parts, or replacing worn components, which can lead to unexpected breakdowns.

A professional maintenance plan helps you avoid potential issues by scheduling regular inspections and tune-ups. These plans often include priority service, discounts on repairs, and a detailed record of your system’s maintenance history. Investing in a maintenance plan is an easy and effective way to keep your HVAC system in good shape while avoiding expensive surprises.

Contact MTN Valley Heating and Air Conditioning

By taking proactive steps—like keeping vents clear, scheduling regular maintenance, and leaving complex repairs to the professionals—you can extend the life of your HVAC system, lower your energy bills, and enjoy a comfortable home year-round.

If you’re ready to take the guesswork out of HVAC maintenance, MTN Valley Heating & Air Conditioning is here to help. We make it simple to keep your system in top shape. Contact us today to schedule your maintenance and keep your HVAC system running smoothly!