As the scorching summer sun starts to fade and the relief of fall starts to settle in, residents of Holbrook start preparing their homes and yards for the the upcoming cold weather. For many, that leads to the question of whether they need to cover their outside air conditioner for the winter.

While it may seem like a smart idea, the fact 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 Fal-Ken Heating & Cooling Corporation share five reasons why covering your air conditioning equipment doesn’t need to be on your fall to-do list and what you should do instead.

1. Your AC can Handle Snow

Outdoor AC units are built to withstand harsh weather conditions like snow in the winter. These units are built with durable materials and parts 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 parts 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 not at all what you want in your outdoor unit. That’s because allowing moisture to collect inside the unit creates the perfect conditions for mold and mildew to spread.

Mold and mildew not only have an unpleasant aroma, but they can also pose health risks, especially for household residents with respiratory issues or allergies. Additionally, the unwanted 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

People aren’t the only ones who make plans for winter. Animals that live around your home are also searching for a warm, cozy place to crash for the winter months. For many critters, a covered air conditioner is the perfect winter refuge.

Birds, mice, chipmunks and even rats often make nests inside covered air conditioners. Animals living in a covered air conditioner can cause several problems. Rodents can chew through wires, insulation and other components, causing damage that may require pricey repairs. Debris animals bring into the AC to construct a warm and comfortable bed can obstruct airflow and ventilation, decreasing the efficiency of the AC and potentially causing it to overheat. In addition, animal excrement can result in unsanitary conditions and potent odors.

Leaving your air conditioner uncovered helps discourage wildlife, because an uncovered AC provides less shelter from cold weather than a covered unit. That’s better for your AC—and leaves you with less mess to throw away and things to repair when winter is over.

4. Covering Your Air Conditioner Restricts Airflow

Another reason it’s better that you don’t cover your AC unit in the winter is because a cover blocks airflow through the unit. Adequate airflow is crucial for the AC system because it facilitates heat exchange and allows the unit to cool properly. When airflow is severely limited, the system has to work harder to achieve the desired temperature, resulting in greater energy consumption and strain on the components.

In addition, if you run your air conditioning 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 lack of proper airflow could cause the compressor to overheat, resulting in its failure or damage.  That’s why it is crucial to ensure the outdoor unit has no 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 cooling system than to cover your exterior AC unit.

There are several key maintenance activities 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 get rid of any debris such as leaves, small branches and dirt to allow proper airflow. Second, examine and clean the coils, fins and filters to make sure there isn’t any dirt and dust buildup that would hinder efficient heat exchange or airflow.

Scheduled 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, 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.