The Complete Fall Air Conditioning Checklist

As the leaves begin to fall and the temperatures drop, it’s easy to shift your focus entirely to heating—but don’t forget about your air conditioner just yet. Without proper end-of-season care, your AC system could suffer from buildup, weather exposure, or unnoticed wear that carries over into next year. The Maynard Man is here with a thorough fall checklist that walks you through everything your cooling system needs before it takes a break for the season. From simple cleaning to a few smart adjustments, these steps will help your system rest easy through the winter and be ready to go when the heat returns. It only takes a little effort now to avoid big problems later. Let’s make sure your AC ends the season on a high note.

Adjust Your Thermostat Settings

Start your fall AC wrap-up by checking your thermostat. If you’re no longer running your air conditioning regularly, go ahead and switch the setting from “cool” to either “off” or “heat,” depending on how chilly it’s getting. This keeps your AC from kicking on during mild temperature swings—and saves you energy in the process. If you have a programmable or smart thermostat, take a few minutes to adjust your schedule for the cooler months. Set lower temperatures for nighttime and while you’re away, and make sure the system isn’t calling for cooling when it’s no longer needed. These small changes keep your system aligned with the season and prevent unnecessary wear.

Replace or Clean Your Air Filter

Your air filter has been working hard all summer—trapping dust, pollen, and debris while your system ran to keep you cool. Now’s the perfect time to replace it. A clean filter not only improves airflow but also sets the stage for cleaner indoor air as you transition into heating season. If your system uses reusable filters, give them a thorough rinse and allow them to dry fully before reinserting. For disposable filters, choose the right size and MERV rating for your home’s needs. This simple step reduces strain on your HVAC system, improves efficiency, and helps maintain better air quality year-round.

Clear and Cover the Outdoor Unit

Your AC’s outdoor condenser has likely collected leaves, dirt, twigs, and other yard debris during the summer. Before winter weather sets in, take a few minutes to gently clean around the unit. Use gloves or a soft brush to remove debris and clear at least two feet of space around it for ventilation. Once it’s clean and dry, protect it from the elements with a breathable cover made specifically for HVAC units. Avoid using plastic tarps or materials that trap moisture, which can lead to rust or mildew. This added protection helps prevent damage from ice, snow, and falling branches—keeping your system in great shape for next spring.

Inspect for Wear or Damage

Fall is the perfect time to give your AC system a visual once-over. Look for frayed wires, rust spots, loose panels, or signs of corrosion on the outdoor unit. Inside, check around the air handler or furnace for any moisture buildup, unusual smells, or sounds that weren’t there earlier in the season. Even small issues—like a rattling panel or worn-out insulation—can lead to bigger problems if left unaddressed. Catching them now gives you the chance to fix them while demand is low and before they become urgent. If anything seems off or unfamiliar, jot it down and share it with your technician during your seasonal HVAC check-up.

Clean Around Indoor Vents and Registers

Your vents and registers play a key role in keeping air flowing smoothly—and after a summer of heavy use, they could probably use some attention. Start by vacuuming dust and debris from the grilles. Built-up particles can restrict airflow and get circulated back into your home when the heat kicks on. Next, make sure furniture, rugs, or curtains aren’t blocking any vents. Obstructed registers force your system to work harder and can create uneven temperatures from room to room. A little rearranging now can help maintain consistent airflow and reduce strain on both your cooling and heating systems throughout the season.

Schedule an End-of-Season Tune-Up

Even if your AC seemed to run fine all summer, a professional tune-up at the end of the season can make a big difference. A trained technician can inspect your system for hidden wear, refrigerant imbalances, or electrical issues that might otherwise go unnoticed until next year. This is also a great opportunity to prep your heating system before colder weather sets in. Your HVAC professional can ensure a smooth transition from cooling to heating, tighten loose connections, clean internal components, and recommend any necessary repairs while they’re still minor. It’s a quick visit that can protect your comfort—and your budget—in both seasons.

Wrap-Up: Make Fall Count with the Maynard Man

Winding down your air conditioning system the right way isn’t just about putting it to rest—it’s about protecting the investment you’ve made in year-round comfort. With just a few simple steps, you can help your AC system recover from a busy summer and be ready to go next spring without hiccups. From cleaning filters to covering the outdoor unit and scheduling a professional tune-up, this checklist gives your system the attention it deserves. The Maynard Man knows that a little care now goes a long way later. Contact Maynard Plumbing, Heating, Cooling to schedule your fall HVAC service and keep your whole system running strong—no matter the season.