Replacing your air conditioner’s air filter is one of the easiest and most important maintenance tasks you can perform.

The air filter in your air conditioner does more than just keep the air coming from your system clean. It actually plays a key role in operating your system, and if you want to avoid HVAC repairs and premature replacement, it’s important to replace the filters every three months at a minimum. Changing the air filter as recommended can keep your system running properly and make it more energy efficient. It also helps you avoid the pitfalls of not replacing it, which include:

#1. Frozen Coils

When your air filter is clean, it allows air to flow out of your air conditioner freely, but when the filter gets clogged with dirt and debris, it restricts the airflow. This causes the air to build up inside of your unit, which, in turn, lowers the temperature inside. If the problem persists for too long, ice will start to form on the coils of your system, reducing its efficiency and effectiveness.

#2. Reduced Efficiency

Iced over coils aren’t the only pitfall of not replacing your air filter that can reduce your system’s efficiency. When the airflow is restricted, your system won’t be able to cool your home properly, and your system will have to work harder to keep the temperature throughout your home consistent. This can lead to the need for frequent repairs, as well as high energy bills.

#3. Increased Short Cycling

It’s normal for your air conditioner to short cycle (cycle on and off) a few times each day. However, when the filter gets clogged, it causes these cycles to happen much more frequently. Not only does this increase in short cycling leave you with higher energy bills; it can lead to big temperature shifts in your home.

#4. Inconsistent Cooling

Even if the buildup of cold air inside your air conditioner hasn’t yet led to frozen coils, it can still have a negative impact on your system’s cooling power. People with dirty air filters often experience hot and cold spots throughout their homes, as well as overall discomfort.

#5. A Buildup of Allergens

When the air filter is no longer able to keep the air in your home clean, it allows allergens to build up inside of your duct system. When you turn your system on, that buildup of allergens will be spread throughout your home. This can be especially troublesome for anyone in your home that suffers from respiratory allergies or asthma.


Each and every one of the pitfalls we’ve gone over add excess wear and tear to your air conditioner, and your HVAC system as a whole, which decreases its lifespan. Don’t allow something as simple as forgetting to change your filters become the reason you have to replace your air conditioner. Protect your system, and your wallet, by changing your air filters at least every three months.

Whether you have questions or concerns about replacing your air filter, or you are looking for AC maintenance or repair, contact us at Tri-Elite Advisors today.