Dirty AC Coil

Is the air coming from your vents warm? Does your system stop and restart continuously? Is there any frost built up on your AC? If you are experiencing any of these issues it is a good indicator that the evaporator coil — also known as an AC coil — may need to be replaced. A few other signs to look out for are:

  • Refrigerant leaking on the indoor unit
  • Hissing sounds coming from the unit
  • AC fails to turn on

What is an AC coil?

Fouled Air Conditioner Evaporator Coil | AA Temperature ServicesThe main purpose of an AC coil is to carry the refrigerant needed to absorb heat from inside your home and release it outside. The blower motor and the evaporator coil work together to cool the refrigerant in your home. As the blower motor forces through the AC coil, the coil needs to be free of dust and debris, or else this will restrain airflow and reduce heat transfer to the outside unit.

What causes a dirty AC coil?

A common cause of a dirty AC coil is due to inconsistent filter changes. If you aren’t replacing your air filter monthly or at the recommended time, the particles and contaminants will continue to be blown over the main components of your central air system. A filter’s main purpose is to protect all of the main components of your system from dust, hair, and other particulate matter. This dust then covers your evaporator coil over time — as shown in the photo — and will affect the heat transfer process. The best way to keep your system free of dust and debris and to ensure a clean AC coil is to remember to change your filter monthly.

How to help prevent your AC coil from getting dirty

  • Schedule routine maintenance for your AC annually with AA Temperature Services. We can look over and wipe down all the main components of your system, check refrigerant pressures, and tighten electrical wires to ensure optimal efficiency. 
  • Never miss your routine maintenance again by signing up for an HVAC maintenance plan today. You receive two annual maintenance visits, friendly reminders when you are due for maintenance, additional 10% savings on repairs, and priority service.  To learn more about HVAC maintenance, check out our blog!
  • Have one of our professional HVAC technicians install an iWave-R and/ or UV light today to help reduce particulates and contaminants in your HVAC system. The iWave-R is an indoor air purification system that works to remove particulate matter like dust and pollen from the air. A UV light helps rid your HVAC system of mold spores and mildew growth. These systems work great together to increase your indoor air quality and to protect the most vital parts of your HVAC system.

Our friendly staff and HVAC technicians at AA Temperature Services are here to help you with all of your HVAC needs. If you suspect that your AC coil is dirty or not working properly, call 941-800-5452 today and we can get you set up with an appointment. You can also contact us online!