As the hot summer sun starts to fade and the relief of fall starts to settle in, residents of Carson City start preparing their homes and yards for the wintertime. For many, that leads to the question of whether they should cover their exterior air conditioning unit for the winter.

While it may seem like a smart idea, the truth is there are a number of reasons why you shouldn’t cover your AC unit in the winter. In addition to not being something you need to do, covering your outdoor air conditioning equipment can even cause problems.

Here, the specialists at Anderson Heating & A/C share five reasons why covering your air conditioner 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 built to withstand harsh weather conditions like snow in the winter season. These machines are built with sturdy 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 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 AC unit 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 sealing moisture inside the unit generates the perfect conditions for mold and mildew to flourish.

Mold and mildew not only have an undesirable aroma, but they can also create health risks, especially for people with respiratory issues or allergies. Plus, 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. Covered AC Systems Can Attract Animals

You and your family 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 hide out for the wintry months. For many creatures, a covered air conditioner is an awesome winter dwelling.

Birds, mice, chipmunks and even rats frequently make nests inside covered air conditioners. Animals living in a covered air conditioner can cause several 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 place to get out of the cold weather can obstruct airflow and ventilation, limiting 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 discourage wildlife, because an uncovered AC gives them less shelter from cold weather than a covered unit. That’s better for your AC—and leaves you with less mess to pick up and things to repair once the snow melts.

4. A Winter Cover for AC Units 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 allows the unit to cool effectively. When airflow is severely limited, the system has to work harder to achieve the desired temperature, leading to increased energy consumption and strain on the components.

In addition, if you run your AC without knowing 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 essential to ensure the outdoor unit is always cleared of any obstructions and is not covered to maintain maximum 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 conditioning unit than to cover your outdoor AC unit.

There are numerous key maintenance projects you should prioritize to ensure maximum 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, small branches and dirt to promote 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.

Routine air conditioning maintenance not only enhances 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 approach that can greatly benefit your entire HVAC system in the long run.