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

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

Here, the specialists at Air-Right Energy Design 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. Snow won’t Hurt Your AC

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

2. Covering AC Systems can Encourage Mold

One of the reasons you should not 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 allowing moisture to collect inside the unit generates the perfect conditions for mold and mildew to flourish.

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

As an alternative to covering the unit, instead ensure proper drainage and keep the area around the unit clean of debris, allowing for efficient airflow and preventing moisture buildup.

3. A Covered Air Conditioner Can Attract Animals

Human beings aren’t the only ones who get ready for winter. Animals that live around your home are also searching for a warm, cozy place to live for the cold months. For many critters, a covered air conditioner is an awesome winter dwelling.

Birds, mice, chipmunks and even rats commonly make homes inside covered air conditioners. Animals living in a covered air conditioner can cause numerous problems. Rodents can chew through wires, insulation and other components, causing damage that may require expensive repairs. Debris animals bring into the AC to construct a warm and comfortable nest can obstruct airflow and ventilation, decreasing the efficiency of the AC and potentially causing it to overheat. Additionally, animal excrement can result in unsanitary conditions and foul odors.

Leaving your air conditioner uncovered helps discourage animals, because an uncovered AC gives them less shelter from cold weather than a covered unit. That’s better for your cooling system—and leaves you with less mess to pick up and things to repair in the spring.

4. A Winter Cover for AC Units 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 essential for the AC system because it helps with heat exchange and enables the unit to cool properly. When airflow is restricted, the system has to work harder to maintain the desired temperature, resulting in greater energy consumption and strain on the components.

In addition, if you turn on your AC without knowing that the outside unit is covered or because you simply forgot, it could result in a range of problems. One issue is that the lack of appropriate airflow could cause the compressor to overheat, resulting in its failure or damage.  That’s why it is vital to ensure the outdoor unit has no barriers and is not covered to maintain optimal airflow.

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

The bottom line is, it’s lots more effective to do a little maintenance for your cooling system than to cover your exterior AC unit.

There are a number of key maintenance activities you should prioritize to ensure the best possible function and longevity of your AC unit. First, it’s wise to examine your outdoor AC unit regularly and get rid of any debris such as leaves, twigs and dirt to allow proper airflow. Second, inspect and clean the coils, fins and filters to make sure they are free from dirt and dust buildup that would hinder successful heat exchange or airflow.

Regular air conditioning maintenance not only improves 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.