Signs It’s Time to Replace Your HVAC Filter (and How to Do It)

Signs It’s Time to Replace Your HVAC Filter (and How to Do It)

Your HVAC system works hard year-round to keep your home comfortable. But one simple maintenance task is often overlooked—and it could be costing you money, efficiency, and even your indoor air quality.

We’re talking about your HVAC filter.

Replacing your HVAC filter regularly is one of the easiest ways to keep your system running efficiently and extend its lifespan. But how do you know when it’s time to replace it?

Here are some telltale signs to look out for—and a quick guide on how to change it yourself.

5 Signs It’s Time to Replace Your HVAC Filter

1. Your Energy Bills Are Creeping Up
A dirty filter restricts airflow, forcing your system to work harder. If you’ve noticed a sudden spike in your energy bill without a clear reason, your filter may be clogged.

2. Rooms Are Unevenly Heated or Cooled
Poor airflow caused by a dirty filter can lead to inconsistent temperatures in your home. If some rooms feel stuffy or harder to heat/cool, your filter could be the culprit.

3. More Dust Around Your Vents and Home
If your HVAC filter is clogged, it can’t trap dust and debris properly. You may notice more dust collecting on surfaces or around your air vents.

4. Allergy Symptoms Are Getting Worse
A clean filter helps remove allergens like pollen, pet dander, and mold spores. If your allergies are flaring up indoors, a dirty filter may be circulating those particles.

5. You Can’t Remember the Last Time You Changed It
Most filters should be replaced every 1–3 months, depending on usage, pets, and air quality. If you’re drawing a blank on when you last changed it—it’s probably time.

How to Replace Your HVAC Filter

Changing your filter is a simple DIY task. Here’s how to do it:

1. Turn Off Your HVAC System
   For safety, always shut off your system before replacing the filter.

2. Locate the Filter
   Most filters are found behind a return air vent or inside the air handler.

3. Check the Size
   The size is usually printed on the edge of the old filter. Make sure to buy the correct replacement.

4. Remove and Replace
   Slide out the old filter, insert the new one facing the correct direction (look for the airflow arrows), and you’re done!

5. Set a Reminder
   Mark your calendar or set a phone reminder to check your filter monthly.

Call the Pros at All Temp Co., Inc.

While changing your HVAC filter is a great DIY habit, some issues need expert attention. If you’re still experiencing uneven temperatures, rising energy bills, or persistent air quality issues—it might be time for a professional tune-up.

Call the trusted HVAC experts at All Temp Co., Inc. today!
Whether it’s routine maintenance, a full system inspection, or improving your home’s comfort, we’re here to help.