Changing the air filter in your HVAC is a simple but important part of air conditioning maintenance because it ensures good indoor air quality and keeps your unit working efficiently. The filter should be replaced at least every three months or every month if you have pets or anyone at home with allergies. The warning signs below also indicate when you need to change the filter.

How to Know When to Change Your HVAC Filter

1. Inefficient Cooling

A clogged filter reduces airflow and stops your HVAC system from working efficiently. As a result, your rooms won’t feel as cool as they should, even when you set a comfortable temperature. When your system isn’t functioning properly, it will also have to work harder to cool the air, making it less energy-efficient. This will lead to higher bills, which is another sign that your filter may need to be changed.

2. Allergy Attacks

The filter in your air conditioning traps pollutants like pollen, pet dander, and dust. However, if the filter becomes clogged with these contaminants, they end up blowing into other parts of the AC system and your rooms. If someone in your home has allergies or asthma, the lower air quality is likely to result in flareups.

3. Strange Noises

Air conditioners always make a little noise when they’re working, but new and unusual sounds suggest a problem. High-pitched whistling or grinding sounds may result when the filter is clogged and air can’t move through it properly.

If you changed the filter and still notice these noises, contact an air conditioning maintenance expert to investigate alternative causes. 

In addition to changing your air filter regularly, schedule routine maintenance with a professional from HI State Services in Ewa Beach. The family-owned company has served the area for more than 10 years. They offer air conditioning maintenance programs quarterly, semiannually, and annually as well as repairs and installations. Call (808) 741-8252 to get a free estimate, or visit them online to learn more about their services.