Keeping your air conditioner running at peak performance is essential, especially during the hot and humid St. Louis summers. One of the simplest yet most important maintenance tasks you can perform is to change your air conditioner filter regularly. A clean filter not only improves your home’s indoor air quality but also helps your system run more efficiently, saving you money on energy bills and extending the life of your unit.
At Galmiche & Sons, we have been helping St. Louis homeowners with their heating and cooling needs for decades, and we know that filter replacement is one area where many people either forget or make common mistakes. This guide will walk you through the process so you can change your air conditioner filter like a pro.
To learn more or schedule professional air conditioner servicing in St. Louis, contact our team today.
Why Changing Your Air Conditioner Filter Matters
Over time, your AC filter traps dust, dirt, pollen, pet dander, and other airborne particles. When the filter becomes clogged, your system must work harder to push air through, leading to higher energy usage and potential breakdowns. Additionally, dirty filters can circulate contaminants throughout your home, worsening allergies or respiratory problems. Changing your air conditioner filter is a key part of air conditioner maintenance for old units and new systems alike.
By replacing your filter regularly, you will:
- Maintain efficient airflow
- Reduce strain on your AC system
- Improve indoor air quality
- Lower monthly utility bills
- Prevent costly repairs
How Often Should You Change Your Air Conditioner Filter?
While the frequency depends on factors like filter type, household size, pets, and indoor air quality, most experts recommend replacing filters every 1 to 3 months. Changing your air filter is a key part of seasonal air conditioner maintenance. In St. Louis, where seasonal changes can be extreme, you may need to change them more frequently during heavy use periods.
Step-by-Step Guide: How to Change Your Air Conditioner Filter
Step 1: Turn Off Your HVAC System
Before you begin, always turn off your air conditioner at the thermostat or circuit breaker to ensure safety.
Step 2: Locate the Air Filter
Filters are usually located in the return air duct or inside the air handler unit. Common locations include:
- Behind a vent grille on a wall or ceiling
- Inside the indoor unit’s filter slot
- Near the blower compartment
Step 3: Check the Filter Size
Look for the filter size printed on the frame (e.g., 16x25x1). Make sure you purchase the correct size and type recommended by your manufacturer.
Step 4: Remove the Old Filter
Carefully slide the old filter out, noting the direction of the airflow arrows on the frame.
Step 5: Insert the New Filter
Place the new filter into the slot with the arrows pointing in the correct airflow direction. Ensure it fits snugly without bending.
Step 6: Turn the System Back On
Once the filter is secure, turn your system back on and enjoy cleaner, healthier air.
Common Mistakes to Avoid
- Forgetting to replace the filter for months at a time
- Using the wrong filter size or type
- Installing the filter with the airflow arrows pointing the wrong way
- Choosing the cheapest filter without considering quality
FAQs About Changing Your AC Filter
If you notice reduced airflow, more dust around your home, or increased allergy symptoms, it may be time to replace your filter.
Most disposable filters should be replaced, not cleaned. Some high-quality filters are reusable and can be washed, but always check your manufacturer’s instructions.
Yes. A clean filter allows your system to work more efficiently, which can reduce your monthly utility costs. Learn more about how air conditioner maintenance can affect energy savings.
Schedule Professional AC Maintenance in St. Louis
While changing your air conditioner filter is a simple task, it is only one part of keeping your HVAC system running smoothly. Professional maintenance from Galmiche & Sons can help prevent costly repairs, extend the life of your system, and keep your home comfortable year-round.
If you are unsure how to change your air conditioner filter, or if you want a thorough tune-up from trusted local experts, contact Galmiche & Sons today. We proudly serve St. Louis and the surrounding areas with expert HVAC installation, maintenance, and repair services.
Call our heating and air conditioning experts now or schedule your service online to keep your system running efficiently and your air clean all year long.
