As the scorching summer sun starts to fade and the cooler temperatures of fall starts to settle in, residents of Norco and surrounding parishes start preparing their homes and yards for the wintertime. For many, that leads to the question of whether they need to cover their exterior air conditioner for the winter.

While it may seem like a good idea, the reality is there are multiple 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 Mayeuxs AC & Heating 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 systems are built with solid materials and components 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 parts from moisture and debris.

2. Covered AC Systems may Encourage Mold Growth

One of the reasons you shouldn’t cover your outdoor air conditioning equipment in the cold months 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 generates the perfect conditions for mold and mildew to spread.

Mold and mildew not only have an undesirable odor, but they can also present health risks, especially for household residents with respiratory issues or allergies. Also, the trapped 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 clean of debris, allowing for efficient airflow and preventing moisture buildup.

3. A Covered Air Conditioner Can Attract Animals

You and your family aren’t the only ones who make plans for winter. Animals that live around your home are also looking 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 frequently make winter dens inside covered air conditioners. Animals dwelling in a covered AC unit can cause many problems. Mice can chew through wires, insulation and other connections, 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 impair airflow and ventilation, lowering the efficiency of the unit and potentially causing it to overheat. Additionally, animal droppings can result in unsanitary conditions and foul odors.

Leaving your air conditioner uncovered helps dissuade wildlife, because an uncovered AC gives them less shelter from the elements than a covered unit. That’s better for your air conditioner—and leaves you with less mess to throw away 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. Proper 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 reach the desired temperature, resulting in greater energy consumption and strain on the components.

In addition, if you use your air conditioner without realizing that the outdoor unit is covered or because you simply forgot, it could result in a range of problems. One issue is that the absence of proper airflow could cause the compressor to overheat, causing its failure or damage.  That’s why it is necessary to ensure the outdoor unit is always cleared of any obstructions and is not covered to maintain the best possible airflow.

5. AC Maintenance Works Better 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 outdoor AC unit.

There are numerous key maintenance projects you should prioritize to ensure maximum operation and longevity of your AC unit. First, it’s wise to check your outdoor AC unit regularly and clear any debris such as leaves, small branches and dirt to promote proper airflow. Second, inspect and clean the coils, fins and filters to make sure there isn't any dirt and dust buildup that would hinder successful heat exchange or airflow.

Routine 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 significantly benefit your entire HVAC system in the long run.