Keep Your AC Running Like New: Easy Tips for Year-Round Efficiency

A well-maintained air conditioner doesn’t just cool better—it saves energy and lasts longer too. Regular upkeep can keep your air conditioning unit working efficiently throughout the year, preventing breakdowns during the peak of summer or unexpected problems in warmer climates. Here are some simple and practical tips to help you maintain your AC system like a pro.

1.Change the Air Filters Regularly

Dirty air filters are one of the most common causes of reduced AC performance. They limit airflow, which makes your system work harder and can lead to overheating or frozen coils. Over time, this strain can shorten the lifespan of your AC unit. For households with pets, smokers, or allergy sufferers, replacing the filter monthly is ideal. Use high-efficiency filters that trap dust, pollen, and other particles effectively, and mark your calendar or set a reminder to check them.

2.Keep the Outdoor Unit Clean

The outdoor condenser unit needs free airflow to operate efficiently. A buildup of leaves, twigs, or grass clippings can block airflow and reduce heat exchange efficiency. Aside from spraying it with a garden hose (after cutting power), you can also gently straighten any bent fins with a fin comb. Avoid using high-pressure water or harsh tools, which can damage the unit. Make a habit of checking the area after storms or during heavy pollen seasons.

3.Clean the Vents and Registers

Vents that are blocked by dust or furniture can result in uneven cooling and added strain on the AC. Use a vacuum with a hose attachment to remove dust from vents and grilles at least once a month. For deeper cleaning, consider removing the vent covers and wiping them down. If airflow still seems weak, it might be a sign of a clogged duct or more significant obstruction that requires professional attention.

4.Check the Thermostat Settings

Proper thermostat use is key to comfort and energy savings. Programmable thermostats let you set cooling schedules so your AC doesn’t run when you don’t need it. For example, set it to a higher temperature when you're away and schedule it to cool down 30 minutes before you return. Smart thermostats go a step further by learning your habits and adjusting automatically. Many models can also be controlled from your smartphone, allowing remote temperature adjustments.

5.Schedule Annual Professional Maintenance

While DIY upkeep is important, an annual inspection by a certified HVAC technician ensures your system is fully optimized. Technicians can detect low refrigerant levels, worn belts, dirty coils, and electrical issues that may not be obvious to the homeowner. Early detection prevents minor problems from turning into major (and costly) failures. Schedule your maintenance in spring to ensure the unit is ready for peak summer use.

6.Keep the Coils Clean

The evaporator coil (inside your home) and condenser coil (outside) are responsible for heat absorption and release. When coated in dirt or dust, they become less effective, causing the system to run longer to achieve the same temperature. You can clean coils with a soft brush or special coil cleaner spray. However, if the coils are very dirty or hard to reach, it’s safer and more effective to have a technician handle the job.

7.Monitor and Seal Duct Leaks

Leaks in the ductwork can lead to significant energy waste—up to 30% of air can be lost in poorly sealed ducts. Inspect exposed ducts in attics, basements, or crawl spaces for gaps, holes, or disconnected sections. Use mastic sealant or aluminum foil tape (not duct tape) to seal small leaks. For more comprehensive sealing, especially in hidden ducts, hire a professional for an energy audit and pressure test.

8.Don’t Ignore Unusual Noises or Smells

Buzzing, rattling, or grinding noises may indicate loose parts, motor issues, or refrigerant problems. Musty smells could signal mold growth in the ductwork or on the evaporator coil. Burning odors might point to electrical issues or overheating components. Turn off the system and consult a technician if you notice anything unusual—catching problems early can prevent expensive damage and ensure a safe, healthy indoor environment.