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How often you change your air filter depends on your home and lifestyle. Things like how many people are in your home, pets, the season, the size of your home, the air quality where you live, and more all impact your HVAC system. The best practice is using visual indicators to determine when it needs changing by checking if light can pass through it. If you can’t see any light, it’s clogged and needs to be changed.

Avoiding regular HVAC maintenance can lead to significant problems and higher costs over time. Without proper care, your system has to work harder, resulting in increased wear and tear, reduced performance, and more frequent breakdowns. This inefficiency leads to higher energy bills as the system consumes more energy to heat or cool your home.

Key components like condensate lines, evaporator coils, and motors require regular cleaning and lubrication to function correctly. Neglecting these tasks can lead to critical problems and costly repairs. Over time, unattended issues can cause permanent damage, potentially requiring you to replace the entire unit much sooner than expected. Additionally, skipping maintenance can negatively impact your indoor air quality.

If you do not regularly change your HVAC filter, it will become clogged with dust, dirt, and other contaminants. This blockage forces the system to work harder to circulate air, leading to higher energy bills, poor temperature regulation, and increased wear on parts, which can cause more frequent breakdowns and shorten the system's overall lifespan. Additionally, a dirty filter that no longer traps contaminants can lead to poor indoor air quality, potential health problems, and even complete system failure.

You should plan to change your AC unit's filter every one to three months, depending on the manufacturer's recommendations. You should also clean the coils at least once per year, but if you have pets or someone in your household has allergies, you might need to clean them more often. Fortunately, many pros will clean the coils and change the filter for you during an inspection, which you should schedule once or twice per year.