As the hot summer heat starts to fade and the refreshingly cool weather of fall starts to settle in, residents of Manassas start preparing their homes and yards for the the upcoming cold weather. For many, that leads to the question of whether they ought to cover their outside air conditioning unit for the winter.

While it may seem like a great idea, in reality there are multiple reasons why you shouldn’t cover your AC unit in the winter. In addition to not being necessary, covering your outdoor air conditioning equipment can actually cause problems.

Here, the experts at Air-Right Energy Design 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 machines are built with solid materials and parts 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 Your Air Conditioner Can Cause Mold

One of the reasons you should avoid covering your outdoor air conditioning equipment in the cold months is because doing so can trap moisture—which is not at all 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 a bad smell, but they can also present health risks, especially for people with respiratory issues or allergies. Also, the trapped 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

Humans 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 crash for the winter months. For many critters, a covered air conditioner is an ideal winter refuge.

Birds, mice, chipmunks and even rats often make winter dens inside covered air conditioners. Animals living in a covered air conditioner can cause many problems. Rats 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 home can impair airflow and ventilation, limiting the efficiency of the unit and potentially causing it to overheat. Moreover, animal waste can result in unsanitary conditions and bad odors.

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

4. An AC Cover Restricts Airflow

Another reason not to cover your air conditioner in the winter is because a cover blocks airflow through the unit. Suitable airflow is essential for the AC system because it assists heat exchange and permits the unit to cool properly. When airflow is restricted, 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 run your AC 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 absence of appropriate 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 always cleared of any blockages 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 much more effective to do a little maintenance for your air conditioner than to cover your outdoor AC unit.

There are a number of key maintenance tasks you should prioritize to ensure optimal function and longevity of your AC unit. First, it’s wise to check 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 impede efficient heat exchange or airflow.

Scheduled air conditioning maintenance not only enhances efficiency, but it also helps extend the unit’s life span, reduces energy consumption and avoids 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.