As the sweltering summer sunshine starts to fade and the refreshingly cool weather of fall starts to settle in, residents of Carpentersville start preparing their homes and yards for the wintertime. For many, that leads to the question of whether they ought to cover their exterior AC for the winter.

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

Here, the experts at Controlled Comfort HVAC 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

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

2. Covering AC Systems can Encourage Mold

One of the reasons you should avoid covering your AC unit in the wintertime 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 creates the perfect conditions for mold and mildew to spread.

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

Instead of covering the unit, instead provide 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 Host Animals

People aren’t the only ones who make plans for winter. Animals that live around your home are also looking for a warm, cozy place to crash for the cold months. For many animals, a covered air conditioner is an awesome winter home.

Birds, mice, chipmunks and even rats often make winter dens inside covered air conditioners. Animals living in a covered air conditioning unit 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 bed can impair airflow and ventilation, decreasing the efficiency of the appliance and potentially causing it to overheat. Additionally, animal excrement can result in unsanitary conditions and potent odors.

Leaving your air conditioner uncovered helps dissuade creatures, because an uncovered AC offers less shelter from the elements than a covered unit. That’s better for your cooling system—and leaves you with less mess to clean up and things to repair in the spring.

4. An AC Cover Restricts Airflow

Another reason not to cover your AC unit in the winter is because a cover restricts airflow through the unit. Proper airflow is crucial for the AC system because it facilitates heat exchange and enables the unit to cool efficiently. When airflow is severely limited, the system has to work harder to reach the desired temperature, leading to additional energy consumption and strain on the components.

In addition, if you turn on your AC without noticing that the outside unit is covered or because you simply forgot, it could result in a range of problems. One issue is that the shortage of appropriate airflow could cause the compressor to overheat, causing 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 the best possible 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 conditioner than to cover your outdoor AC unit.

There are numerous key maintenance tasks you should prioritize to ensure the best possible performance and longevity of your AC unit. First, it’s smart to look at your outdoor AC unit regularly and clear any debris such as leaves, small branches and dirt to allow proper airflow. Second, check and clean the coils, fins and filters to make sure they are free from dirt and dust buildup that would impede efficient heat exchange or airflow.

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