Why AC Maintenance Matters
Regular maintenance extends the life of your air conditioner, keeps it running at peak efficiency, and helps prevent unexpected breakdowns during the hottest days of summer. A well-maintained AC also uses less energy, which lowers your electricity bills. This checklist covers what you can do yourself and what to leave to a professional.
Monthly: Change the Filter
The simplest and most important maintenance task is changing your furnace filter regularly. A dirty filter restricts airflow, making your AC work harder and use more energy. During cooling season, check the filter monthly and replace it every one to three months depending on the type and your home's air quality.
Monthly: Clear the Outdoor Unit
Keep the area around your outdoor condenser unit clear of leaves, grass, and debris. Trim any shrubs or plants to at least two feet away from the unit. A clear unit can pull in air freely, which is essential for efficient cooling. Hose down the fins gently to remove dust and dirt.
Seasonal: Check the Thermostat
Test your thermostat before cooling season starts. Make sure it switches to cooling mode and that the temperature setting triggers the AC to turn on. If you have a smart thermostat, check that the schedule is set for cooling season and that the software is up to date.
Seasonal: Inspect Ducts and Vents
Walk through your home and make sure all supply and return vents are open and unobstructed by furniture or curtains. If you notice weak airflow in one room, check for a closed vent or a disconnected duct. Sealing leaky ducts can significantly improve efficiency.
Annual: Professional Tune-Up
Once a year, book a professional AC maintenance check. A technician will inspect the refrigerant level, check electrical connections, clean the coils, verify the thermostat, and test the system under load. This annual check catches small issues before they become costly repairs and keeps your warranty valid.
When to Call a Professional
Call a professional if your AC is not cooling, if you hear unusual noises, if you notice ice on the refrigerant lines, or if your energy bills spike unexpectedly. These are signs of a problem that needs a trained technician. Do not attempt to recharge refrigerant yourself, as it requires specialized equipment and licensing.