As the sweltering summer sunshine starts to fade and the cooler temperatures of fall starts to settle in, residents of Georgetown start preparing their homes and yards for the the upcoming cold weather. For many, that leads to the question of whether they ought to cover their outdoor air conditioning unit for the winter.

While it may seem like a good idea, the truth is there are a number of reasons why you shouldn’t cover your AC unit in the winter. Along with not being something you need to do, covering your outdoor air conditioning equipment can sometimes cause problems.

Here, the specialists at Miller Climate Control LLC share five reasons why covering your AC doesn’t need to be on your fall to-do list and what you should do instead.

1. Snow won't Hurt Your AC

Exterior AC units are designed to withstand harsh weather conditions like snow in the winter. These units are built with sturdy materials and components that can handle the outdoor elements without damage. The coils and fins of the unit are specially developed to resist corrosion, and the housing is crafted to protect the internal elements from moisture and debris.

2. Covering Your Air Conditioner Can Cause Mold

One of the reasons you shouldn’t cover your air conditioner in the winter is because doing so can trap moisture—which is definitely not what you want in your outdoor unit. That’s because trapping moisture inside the unit generates the perfect conditions for mold and mildew to spread.

Mold and mildew not only have a bad smell, but they can also pose health risks, especially for individuals with respiratory issues or allergies. Plus, the unwanted moisture can corrode the internal components of the AC unit.

Rather than covering the unit, instead ensure proper drainage and keep the area around the unit clear of debris, allowing for efficient airflow and preventing moisture buildup.

3. A Covered Air Conditioner Can Host Animals

Human beings aren’t the only ones who prepare for winter. Animals that live around your home are also looking for a warm, cozy place to hide out for the cold months. For many creatures, a covered air conditioner is the perfect winter home.

Birds, mice, chipmunks and even rats often make homes inside covered air conditioners. Animals residing in a covered air conditioning unit can cause several problems. Rodents can chew through wires, insulation and other connections, causing damage that may require pricey repairs. Debris animals bring into the AC to create a warm and comfortable home can block airflow and ventilation, limiting the efficiency of the AC and potentially causing it to overheat. Moreover, animal waste can result in unsanitary conditions and potent odors.

Leaving your air conditioner uncovered helps discourage wildlife, because an uncovered AC offers less shelter from chilly temperatures than a covered unit. That’s better for your cooling system—and leaves you with less mess to pick up and things to repair when winter is over.

4. An AC Cover Restricts Airflow

Another reason it's better that you don't cover your AC unit in the winter is because a cover restricts airflow through the unit. Suitable airflow is vital for the AC system because it helps with heat exchange and permits the unit to cool properly. When airflow is severely limited, the system has to work harder to reach the desired temperature, resulting in additional energy consumption and strain on the components.

In addition, if you use your AC without realizing that the exterior unit is covered or because you simply forgot, it could result in a range of problems. One issue is that the absence of correct airflow could cause the compressor to overheat, leading to its failure or damage.  That’s why it is necessary to ensure the outdoor unit is always cleared of any obstructions and is not covered to maintain maximum airflow.

5. AC Maintenance Offers More Benefits Than Covering Your Air Conditioner

The bottom line is, it's a lot more effective to do a little maintenance for your air conditioning unit than to cover your outside AC unit.

There are numerous key maintenance projects you should prioritize to ensure maximum operation and longevity of your AC unit. First, it’s wise to examine your outdoor AC unit regularly and clear any debris such as leaves, sticks and dirt to maintain proper airflow. Second, check and clean the coils, fins and filters to make sure there isn't any dirt and dust buildup that would prevent efficient heat exchange or airflow.

Routine air conditioning maintenance not only boosts efficiency, but it also helps extend the unit's life span, lowers energy consumption and prevents costly repairs. Rather than using a cover, putting time and effort into routine air conditioning maintenance is a proactive approach that can substantially benefit your entire HVAC system in the long run.