As the sweltering summer sun starts to fade and the refreshingly cool weather of fall starts to settle in, residents of Albuquerque start preparing their homes and yards for the winter. For many, that leads to the question of whether they need to cover their outdoor air conditioning unit for the winter.

While it may seem like a great idea, in reality 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 sometimes cause problems.

Here, the professionals at I-Deal HVAC share five reasons why covering your AC doesn’t need to be on your fall to-do list and what you should do instead.

1. Your AC Unit Isn’t Damaged by Snow

Outside AC units are designed to withstand harsh weather conditions like snow in the winter season. These units are built with sturdy materials and hardware 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 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 produces the perfect conditions for mold and mildew to flourish.

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

Rather than covering the unit, instead provide 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 Host Animals

Humans aren’t the only ones who get ready for winter. Animals that live around your home are also hunting for a warm, cozy place to hide out for the winter months. For many critters, a covered air conditioner is the perfect winter dwelling.

Birds, mice, chipmunks and even rats often make homes inside covered air conditioners. Animals living in a covered air conditioning unit can cause numerous problems. Mice can chew through wires, insulation and other components, causing damage that may require pricey repairs. Debris animals bring into the AC to make themselves a warm and comfortable home can block airflow and ventilation, reducing the efficiency of the appliance and potentially causing it to overheat. Moreover, animal waste can result in unsanitary conditions and potent odors.

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

4. An AC Cover Restricts Airflow

Another reason you shouldn’t cover your AC unit in the winter is because a cover restricts airflow through the unit. Adequate airflow is vital for the AC system because it helps with heat exchange and enables the unit to cool properly. When airflow is severely limited, the system has to work harder to achieve the desired temperature, causing increased energy consumption and strain on the components.

In addition, if you turn on 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 vital 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 a lot 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 the best possible function and longevity of your AC unit. First, it’s a good idea to inspect your outdoor AC unit regularly and clear any debris such as leaves, twigs and dirt to promote proper airflow. Second, examine 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.

Routine air conditioning maintenance not only improves 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 substantially benefit your entire HVAC system in the long run.