The air filter is a key component of your AC unit. This screen allows treated air into your home, and you may need premature air conditioning repairs if it isn't replaced routinely. If you aren't familiar with the AC filter, learn more about it below.

What to Know About Changing an Air Filter

What is the filter's function?

The filter captures pollutants in the atmosphere and prevents them from entering your home when the AC unit runs. These contaminants can include dust, allergens, mold, and other harmful particles. When the air filter is clean, your indoor air quality improves, which is beneficial for the health of you and your family.  

How can a dirty filter impact my AC unit?

Your AC can't deliver clean air into your home if the screen is contaminated. As dirt and debris accumulate, the coils could freeze, forcing the unit to work harder.

air conditioning repair

Other components may also experience additional wear as dust and other particles build up. When this happens, more energy is used for the equipment to run, resulting in higher energy bills. A clean air filter can decrease energy consumption by 5% to 15%.     

How do I know my air filter needs to be changed?

Luckily, there are indicators you can watch out for to know if it’s time to change the air filter, which can prevent the need for premature air conditioning repair. A few signs include: 

  • Excessive dust in the home
  • A noticeably gray or dirty filter
  • Lukewarm air

How often should I change my air filter?

This can vary depending on how often you run the air conditioning unit and the type of air filter being used. Some products specify on the packaging how often to switch them out. In this instance, it’s best to follow their guidelines about replacement.

If you use the AC frequently, it may be best to replace the filter monthly. However, if you don't use the equipment that often, you may be fine with changing the screen every three months. Keeping track of when you put in a new filter will help you determine when it's time for a new one.


To prevent a dirty AC air filter from damaging your unit, contact Climatech Mechanical Heating & Air Conditioning Services in New Haven County, CT. The HVAC contractor will help with air conditioning repairs, replacements, and installations to ensure your family is comfortable year-round. Call (203) 269-1600 or visit their website to find out more about services.