As the hot summer heat starts to fade and the cooler temperatures of fall starts to settle in, residents of Albuquerque 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 exterior 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. Along with not being necessary, covering your outdoor air conditioning equipment can sometimes cause problems.

Here, the professionals at I-Deal HVAC 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 Unit Isn’t Damaged by Snow

Outside AC units are designed to withstand harsh weather conditions like snow in the wintertime. These units are built with solid 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 designed to protect the internal components from moisture and debris.

2. Covering Your Air Conditioner Can Cause Mold

One of the reasons you should not cover your air conditioner in the cold months is because doing so can trap moisture—which is the opposite of what you want in your outdoor unit. That’s because trapping moisture inside the unit creates the perfect conditions for mold and mildew to thrive.

Mold and mildew not only have a bad aroma, but they can also pose health risks, especially for people with respiratory issues or allergies. Additionally, the excess moisture can corrode the internal components of the AC unit.

Rather than covering the unit, instead make sure the unit has proper drainage and keep the area around the unit clear of debris, allowing for efficient airflow and preventing moisture buildup.

3. Your Covered Air Conditioning Unit Can Attract Animals

People aren’t the only ones who make plans for winter. Animals that live around your home are also searching for a warm, cozy place to hide out for the winter months. For many animals, a covered air conditioner is an ideal winter refuge.

Birds, mice, chipmunks and even rats frequently make winter dens inside covered air conditioners. Animals residing in a covered AC unit can cause many problems. Rats can chew through wires, insulation and other parts, causing damage that may require costly repairs. Debris animals bring into the AC to make themselves a warm and comfortable home can obstruct airflow and ventilation, decreasing the efficiency of the AC and potentially causing it to overheat. In addition, animal excrement can result in unsanitary conditions and potent odors.

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

4. Covering Your Air Conditioner Restricts Airflow

Another reason not to cover your air conditioning equipment in the winter is because a cover blocks airflow through the unit. Proper airflow is crucial for the AC system because it assists heat exchange and permits the unit to cool effectively. When airflow is constrained, the system has to work harder to maintain the desired temperature, causing increased energy consumption and strain on the components.

In addition, if you run your air conditioner without noticing 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 proper airflow could cause the compressor to overheat, causing its failure or damage.  That’s why it is vital to ensure the outdoor unit is always cleared of any blockages and is not covered to maintain the best possible 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 cooling system than to cover your exterior AC unit.

There are several key maintenance projects 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 pull out any debris such as leaves, twigs 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 hinder efficient heat exchange or airflow.

Regular 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, committing time and effort into routine air conditioning maintenance is a proactive plan of action that can greatly benefit your entire HVAC system in the long run.