As the sweltering summer sunshine starts to fade and the refreshingly cool weather of fall starts to settle in, residents of Monroe 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 truth is there are many reasons why you shouldn’t cover your AC unit in the winter. In addition to not being needed, covering your outdoor air conditioning equipment can actually cause problems.

Here, the professionals at Lanz Furnace and Fireplace 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 designed to withstand harsh weather conditions like snow in the winter season. These systems are built with sturdy materials and components 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 designed to protect the internal components from moisture and debris.

2. Covered AC Systems may Encourage Mold Growth

One of the reasons you shouldn’t cover your outdoor air conditioning equipment in the wintertime is because doing so can trap moisture—which is definitely not what you want in your outdoor unit. That’s because sealing moisture inside the unit generates the perfect conditions for mold and mildew to thrive.

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

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

3. Covered AC Systems Can Attract Animals

Human beings aren’t the only ones who prepare for winter. Animals that live around your home are also looking for a warm, cozy place to live for the wintry 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 dwelling in a covered air conditioner can cause several problems. Rodents can chew through wires, insulation and other connections, causing damage that may require costly repairs. Debris animals bring into the AC to construct a warm and comfortable place to get out of the cold weather can obstruct airflow and ventilation, decreasing the efficiency of the appliance and potentially causing it to overheat. Moreover, 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 air conditioner—and leaves you with less mess to pick up and things to repair when winter is over.

4. An AC Cover Restricts Airflow

Another reason it’s better that you don’t cover your air conditioner in the winter is because a cover limits airflow through the unit. Proper airflow is vital for the AC system because it facilitates heat exchange and enables the unit to cool properly. When airflow is restricted, the system has to work harder to reach the desired temperature, leading to greater energy consumption and strain on the components.

In addition, if you run your air conditioning without knowing that the outdoor unit is covered or because you simply forgot, it could result in a range of problems. One issue is that the lack of correct 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 blockages 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 cooling system than to cover your exterior AC unit.

There are several key maintenance activities you should prioritize to ensure maximum performance and longevity of your AC unit. First, it’s smart to examine your outdoor AC unit regularly and clear any debris such as leaves, sticks and dirt to promote 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 successful heat exchange or airflow.

Regular air conditioning maintenance not only boosts efficiency, but it also helps extend the unit’s life span, decreases energy consumption and avoids costly repairs. Rather than using a cover, committing 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.