As the hot summer sun starts to fade and the cooler temperatures of fall starts to settle in, residents of Buellton start preparing their homes and yards for the wintertime. For many, that leads to the question of whether they ought to cover their outdoor air conditioner for the winter.

While it may seem like a smart idea, the fact is there are several 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 professionals at Allstar Heating & Air Conditioning 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

Outdoor AC units are designed to withstand harsh weather conditions like snow in the winter. These machines are built with durable 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 manufactured to protect the internal elements from moisture and debris.

2. Covering Your Air Conditioner Can Cause Mold

One of the reasons you shouldn’t cover your AC unit in the wintertime is because doing so can trap moisture—which is the opposite of what you want in your outdoor unit. That’s because allowing moisture to collect inside the unit creates the perfect conditions for mold and mildew to thrive.

Mold and mildew not only have a bad smell, but they can also pose health risks, especially for household residents with respiratory issues or allergies. Also, the unwanted 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 clear 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 prepare for winter. Animals that live around your home are also searching for a warm, cozy place to live for the wintry months. For many critters, a covered air conditioner is an ideal winter home.

Birds, mice, chipmunks and even rats frequently make homes inside covered air conditioners. Animals dwelling in a covered AC unit can cause many problems. Rodents can chew through wires, insulation and other components, causing damage that may require costly repairs. Debris animals bring into the AC to create a warm and comfortable home can obstruct airflow and ventilation, limiting the efficiency of the appliance and potentially causing it to overheat. Moreover, animal droppings can result in unsanitary conditions and bad odors.

Leaving your air conditioner uncovered helps discourage wildlife, because an uncovered AC gives them less shelter from chilly temperatures 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. Covering Your Air Conditioner Restricts Airflow

Another reason not to cover your AC unit in the winter is because a cover blocks airflow through the unit. Adequate airflow is essential for the AC system because it assists heat exchange and allows the unit to cool properly. When airflow is severely limited, the system has to work harder to achieve the desired temperature, resulting in additional energy consumption and strain on the components.

In addition, if you use your air conditioning without noticing that the exterior 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, resulting in its failure or damage.  That’s why it is vital to ensure the outdoor unit is always cleared of any barriers 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 air conditioner than to cover your exterior AC unit.

There are numerous key maintenance tasks you should prioritize to ensure the best possible function and longevity of your AC unit. First, it’s a good idea to check your outdoor AC unit regularly and remove any debris such as leaves, twigs and dirt to allow proper airflow. Second, check 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, decreases energy consumption and prevents costly repairs. Rather than using a cover, investing time and effort into routine air conditioning maintenance is a proactive approach that can greatly benefit your entire HVAC system in the long run.