As the scorching summer sun starts to fade and the relief of fall starts to settle in, residents of Morgantown start preparing their homes and yards for the wintertime. For many, that leads to the question of whether they ought to cover their outside AC for the winter.

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

Here, the professionals at Mountain Air share five reasons why covering your air conditioner doesn’t need to be on your fall to-do list and what you should do instead.

1. Your AC can Handle Snow

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

2. Covering Your Air Conditioner Can Cause Mold

One of the reasons you should not cover your AC unit in the wintertime is because doing so can trap moisture—which is not at all what you want in your outdoor unit. That’s because trapping moisture inside the unit creates the perfect conditions for mold and mildew to thrive.

Mold and mildew not only have an unpleasant odor, but they can also create health risks, especially for individuals with respiratory issues or allergies. Additionally, the trapped moisture can corrode the internal components of the AC unit.

Instead of covering the unit, instead make sure the unit has proper drainage and keep the area around the unit clean of debris, allowing for efficient airflow and preventing moisture buildup.

3. Your Covered Air Conditioning Unit Can Host Animals

Humans 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 an ideal winter home.

Birds, mice, chipmunks and even rats frequently make homes inside covered air conditioners. Animals dwelling 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 bed can obstruct airflow and ventilation, lowering the efficiency of the AC and potentially causing it to overheat. Additionally, animal excrement can result in unsanitary conditions and potent odors.

Leaving your air conditioner uncovered helps deter animals, because an uncovered AC provides less shelter from cold weather than a covered unit. That’s better for your air conditioner—and leaves you with less mess to pick up and things to repair once the snow melts.

4. A Winter Cover for AC Units Restricts Airflow

Another reason not to cover your AC unit in the winter is because a cover restricts airflow through the unit. Suitable airflow is crucial for the AC system because it assists heat exchange and permits the unit to cool properly. When airflow is reduced, the system has to work harder to reach the desired temperature, resulting in greater energy consumption and strain on the components.

In addition, if you run your AC without realizing that the outdoor unit is covered or because you simply forgot, it could result in a range of problems. One issue is that the absence of proper 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 free from 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 much more effective to do a little maintenance for your air conditioner than to cover your outdoor AC unit.

There are a number of key maintenance tasks you should prioritize to ensure optimal function and longevity of your AC unit. First, it’s smart to look at your outdoor AC unit regularly and pull out any debris such as leaves, small branches 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 impede effective heat exchange or airflow.

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