As the hot summer heat starts to fade and the refreshingly cool weather of fall starts to settle in, residents of Carpentersville 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 outdoor air conditioning unit for the winter.

While it may seem like a smart idea, in reality 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 sometimes cause problems.

Here, the experts at Controlled Comfort 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. Snow won’t Hurt Your AC

Exterior AC units are built to withstand harsh weather conditions like snow in the wintertime. These units are built with durable materials and components 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 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 wintertime 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 creates the perfect conditions for mold and mildew to flourish.

Mold and mildew not only have an unpleasant odor, but they can also pose 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 ensure proper drainage and keep the area around the unit clear of debris, allowing for efficient airflow and preventing moisture buildup.

3. A Covered Air Conditioner 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 hide out for the wintry months. For many critters, a covered air conditioner is an awesome winter refuge.

Birds, mice, chipmunks and even rats commonly make homes inside covered air conditioners. Animals dwelling in a covered AC unit can cause many problems. Mice 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 place to get out of the cold weather can obstruct airflow and ventilation, decreasing the efficiency of the appliance and potentially causing it to overheat. Additionally, animal droppings can result in unsanitary conditions and foul odors.

Leaving your air conditioner uncovered helps discourage wildlife, because an uncovered AC offers less shelter from the elements than a covered unit. That’s better for your AC—and leaves you with less mess to clean up and things to repair in the spring.

4. A Winter Cover for AC Units Restricts Airflow

Another reason you shouldn’t cover your air conditioning equipment in the winter is because a cover restricts airflow through the unit. Adequate airflow is essential for the AC system because it assists heat exchange and enables the unit to cool effectively. When airflow is reduced, the system has to work harder to reach the desired temperature, leading to additional energy consumption and strain on the components.

In addition, if you use your air conditioner 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 correct airflow could cause the compressor to overheat, leading to its failure or damage.  That’s why it is essential to ensure the outdoor unit is free from blockages and is not covered to maintain optimal airflow.

5. AC Maintenance Works Better Than Covering Your Air Conditioner

The bottom line is, it’s lots more effective to do a little maintenance for your cooling system than to cover your outside AC unit.

There are numerous key maintenance projects you should prioritize to ensure optimal performance and longevity of your AC unit. First, it’s wise to check your outdoor AC unit regularly and remove any debris such as leaves, twigs 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 impede efficient heat exchange or airflow.

Scheduled air conditioning maintenance not only boosts 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 plan of action that can greatly benefit your entire HVAC system in the long run.