How to Clean Air Conditioner Filter Units & When to Call a Pro
A dirty A/C filter restricts airflow, reduces cooling efficiency, and can cause your system to freeze or break down. Knowing how to clean air conditioner filters or replace disposable ones is a basic maintenance task for Connecticut homeowners. This guide explains the steps to inspect, clean, or replace your filter, and outlines the signs that indicate you need help from a professional.
Finding and Checking Your A/C Filter
Air filters are usually located in the return air duct or blower compartment before the air reaches the air handler. Common locations include a slot on the side, bottom, or top of your furnace or air handler, or behind a return air grille on a wall or ceiling.
You should check your filter once a month. Pull the filter out and hold it up to a light source. If you cannot see light passing through the material, the filter is clogged with dust, pet hair, and debris. A clogged filter forces your system to work harder, which can lead to premature wear on the blower motor.
Steps for Cleaning or Changing the Filter
Before you do any work on your HVAC system, turn the thermostat to the “off” position to prevent the unit from turning on while the filter is removed.
Most standard central A/C systems use disposable cardboard-framed fiberglass or pleated paper filters. Remove the old filter and slide the new one into place. Look for the arrows printed on the frame of the new filter. These arrows indicate the direction of airflow and must point toward the blower motor.
Some systems, including ductless mini-splits, use reusable filters. If you have a washable filter, remove it and use a vacuum with a brush attachment to gently lift away loose dust. Next, rinse the filter in a sink or outdoors using a hose with low water pressure. Direct the water through the filter in the opposite direction of the normal airflow to push dirt out. Allow the filter to air dry completely before reinstalling it. A damp filter can promote mold growth inside your unit.
When to Call an HVAC Professional
Regular filter maintenance is something most homeowners can handle. However, a dirty filter can sometimes cause secondary issues that require professional repair.
If you replace a clogged filter but your A/C still blows warm air, or if you notice ice forming on the indoor evaporator coils or the outdoor refrigerant lines, turn the system off immediately. Operating a frozen system can severely damage the compressor. You should also contact a technician if you notice unusual grinding or squealing noises, or if the unit frequently cycles on and off. The licensed professionals at Glasco Heating & Air Conditioning Inc. have the experience to diagnose and fix these complex cooling issues safely.
Maintaining a clean A/C filter protects your equipment and helps your cooling system cool your home effectively. Set a reminder to inspect your filter monthly and replace or clean it as needed. If you encounter performance problems that go beyond a simple filter change, rely on an experienced contractor to inspect the unit.
Keeping Your Cooling System Efficient
Contact Glasco for A/C Maintenance and Repair
If your cooling system is struggling to keep your home comfortable, Glasco Heating & Air Conditioning Inc. is ready to help. Our licensed technicians provide straightforward, honest recommendations for homeowners in South Windsor, CT, and throughout Hartford County.
