Enhance Home Comfort with DIY AC Maintenance


Keeping your air conditioning system in top shape is crucial for maintaining a comfortable indoor environment during the sweltering summer months. While professional AC repair and installation services are recommended for major issues, there are several DIY maintenance tasks you can perform to ensure optimal performance and prolong the lifespan of your unit.

Air Filter Replacement

  1. Locate the air filter in your AC unit, typically found behind return air grilles or in the blower compartment.
  2. Check the filter regularly and replace it every 1-3 months, or more frequently if you have pets or live in a dusty environment.
  3. Refer to your owner’s manual for the correct filter size and type, or consult a professional HVAC technician if unsure.

Outdoor Unit Cleaning

  1. Turn off the power to the outdoor unit before cleaning.
  2. Remove any debris, leaves, or vegetation around the unit, ensuring proper airflow.
  3. Use a soft-bristle brush or a garden hose to gently remove dirt and debris from the coils and fins.

Thermostat Check

  1. Ensure your thermostat is set to the desired temperature and properly calibrated.
  2. Replace the batteries if the display is fading or not responding accurately.
  3. Consider upgrading to a programmable or smart thermostat for improved energy efficiency and convenience.

Ductwork Inspection

  1. Check for any visible leaks or damage in the ductwork, especially at joints and connections.
  2. Seal any gaps or cracks with duct tape or mastic sealant to prevent air leaks.
  3. Consider scheduling a professional duct cleaning if you notice excessive dust or debris buildup.


Regular DIY maintenance can significantly improve the efficiency and longevity of your air conditioning system. However, it’s essential to recognize when professional assistance is required. If you encounter any complex issues or need a comprehensive system evaluation, don’t hesitate to contact Lambert Heating & Air Conditioning for reliable and expert service in the Sioux Falls, SD area.