As the sweltering summer sunshine starts to fade and the relief of fall starts to settle in, residents of Bend start preparing their homes and yards for the winter. For many, that leads to the question of whether they ought to cover their outdoor air conditioning unit for the winter.

While it may seem like a smart idea, the truth is there are many 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 actually cause problems.

Here, the professionals at Tri County Climate Control LLC 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 can Handle Snow

Outdoor AC units are supposed to withstand harsh weather conditions like snow in the winter season. These systems are built with durable materials and components that can handle the outdoor elements without damage. The coils and fins of the unit are engineered to resist corrosion, and the housing is crafted to protect the internal components from moisture and debris.

2. Covered AC Systems may Encourage Mold Growth

One of the reasons you should not cover your outdoor air conditioning equipment in the winter 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 produces the perfect conditions for mold and mildew to spread.

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

As an alternative to covering the unit, instead ensure proper drainage and keep the area around the unit cleared of debris, allowing for efficient airflow and preventing moisture buildup.

3. Your Covered Air Conditioning Unit Can Attract 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 live for the wintry months. For many creatures, a covered air conditioner is an ideal winter refuge.

Birds, mice, chipmunks and even rats frequently make nests inside covered air conditioners. Animals dwelling in a covered air conditioner can cause several problems. Rats can chew through wires, insulation and other components, causing damage that may require expensive repairs. Debris animals bring into the AC to construct a warm and comfortable place to get out of the cold weather can block airflow and ventilation, limiting the efficiency of the unit and potentially causing it to overheat. Additionally, animal excrement can result in unsanitary conditions and bad odors.

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

4. A Winter Cover for AC Units Restricts Airflow

Another reason you shouldn’t cover your air conditioner in the winter is because a cover limits airflow through the unit. Suitable airflow is essential for the AC system because it helps with heat exchange and allows the unit to cool efficiently. When airflow is reduced, the system has to work harder to achieve the desired temperature, resulting in greater 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 absence of appropriate airflow could cause the compressor to overheat, leading to its failure or damage.  That’s why it is vital 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 a whole lot more effective to do a little maintenance for your air conditioner than to cover your outside AC unit.

There are several key maintenance projects you should prioritize to ensure optimal function and longevity of your AC unit. First, it’s a good idea to look at your outdoor AC unit regularly and get rid of any debris such as leaves, sticks and dirt to promote proper airflow. Second, check and clean the coils, fins and filters to make sure they are free from dirt and dust buildup that would hinder effective 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, putting time and effort into routine air conditioning maintenance is a proactive approach that can significantly benefit your entire HVAC system in the long run.