What Everyone Needs To Know About HVAC Systems

Coil Icing Is To Blame For High Humidity Levels In Your Home. Clean Your Filters To Prevent It

by Amelia Martin

Coil icing is one of the most common causes of reduced air conditioner efficiency. This is because when ice forms on an air conditioning system's evaporator coils, it insulates the passing air from the cooling effect of the refrigerant. As a result, the refrigerant fails to absorb as much heat as it should from the warm air. Here is what you should know about how this eventually leads to high humidity levels in your home and why cleaning your filters is an effective preventative measure.

Coil icing and high humidity in a home

In addition to reducing the rate at which an air conditioning system cools a home, coil icing usually affects the ability of the system to remove moisture from the passing air. This is because it is only by effectively cooling the passing air that an air conditioner is usually able to reduce the air's capacity to carry moisture. And since coil icing reduces this ability, it essentially cripples your air conditioner's ability to regulate humidity. This is what may be to blame for the high humidity in your home.

Dirty filters and coil icing

The filters of an air conditioning system play a role in determining the system's susceptibility to icing.

Dirty filters limit the rate of airflow within an air conditioning system. They therefore lead to less warm air availability at the evaporator coil area. This encourages icing since without enough air to balance out the temperature drop caused by the evaporating refrigerant, temperatures in the area will drop below freezing point. The moisture in the passing air then freezes and covers the coils. With time, this ice is what reduces the rate of heat exchange in the evaporator coil area.

Cleaning filters to prevent coil icing

To prevent the airflow-reducing effect of dirty filters, remove them from your air conditioner by unscrewing the screws holding them in place. Use a vacuum to get rid of any dust particles on the filters and if that doesn't unclog the filters, you will then have to wash them.

For the best cleaning results, it is advisable to use a mixture of both vinegar and water. Mix the two in a bucket and then soak the filters in the resulting solution. After a couple of hours, gently scrub the filters to remove any stubborn traces of dirt. Leave the filters in the open air and then screw them back into place after they dry.

Vacuuming and washing the filters will unclog the filters. Doing so will allow for adequate airflow within your system, prevent coil icing and guarantee an effective dehumidification process. For more information on why your air conditioner might be running less efficiently, contact an air conditioner repair service like A Absolute Plumbing & Heating.