As the hot summer heat starts to fade and the cooler temperatures of fall starts to settle in, residents of Delray Beach start preparing their homes and yards for the winter. For many, that leads to the question of whether they ought to cover their exterior air conditioning unit for the winter.

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

Here, the experts at Kilbourne Heating & AC 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. 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 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 manufactured to protect the internal elements from moisture and debris.

2. Covering AC Systems can Encourage Mold

One of the reasons you shouldn’t cover your outdoor air conditioning equipment in the cold months is because doing so can trap moisture—which is the opposite of what you want in your outdoor unit. That’s because trapping moisture inside the unit creates the perfect conditions for mold and mildew to flourish.

Mold and mildew not only have an unpleasant aroma, but they can also present 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

You and your family aren’t the only ones who make plans for winter. Animals that live around your home are also hunting for a warm, cozy place to live for the winter months. For many animals, a covered air conditioner is the perfect winter home.

Birds, mice, chipmunks and even rats often make winter dens inside covered air conditioners. Animals residing in a covered air conditioner can cause many problems. Rodents can chew through wires, insulation and other connections, causing damage that may require pricey repairs. Debris animals bring into the AC to make themselves a warm and comfortable place to get out of the cold weather can impair airflow and ventilation, decreasing the efficiency of the appliance and potentially causing it to overheat. Additionally, animal droppings can result in unsanitary conditions and potent odors.

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

4. An AC Cover Restricts Airflow

Another reason not to cover your air conditioner 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 reduced, the system has to work harder to achieve the desired temperature, resulting in additional energy consumption and strain on the components.

In addition, if you run your air conditioning without realizing 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 proper airflow could cause the compressor to overheat, leading to its failure or damage.  That’s why it is crucial to ensure the outdoor unit is free from barriers and is not covered to maintain optimal airflow.

5. AC Maintenance Is More Effective 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 outside AC unit.

There are several key maintenance projects you should prioritize to ensure maximum function and longevity of your AC unit. First, it’s smart to check 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 impede effective heat exchange or airflow.

Scheduled 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, putting time and effort into routine air conditioning maintenance is a proactive plan of action that can significantly benefit your entire HVAC system in the long run.