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

While it may seem like a good idea, in reality there are many reasons why you shouldn’t cover your AC unit in the winter. On top of not being needed, covering your outdoor air conditioning equipment can sometimes cause problems.

Here, the specialists at AW Heating & Air Conditioning share five reasons why covering your air conditioning equipment 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 winter season. These systems are built with solid materials and parts that can handle the outdoor elements without damage. The coils and fins of the unit are constructed to resist corrosion, and the housing is crafted to protect the internal elements from moisture and debris.

2. Covered AC Systems may Encourage Mold Growth

One of the reasons you should avoid covering 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 produces the perfect conditions for mold and mildew to flourish.

Mold and mildew not only have an unpleasant smell, but they can also present health risks, especially for individuals with respiratory issues or allergies. Also, the trapped moisture can corrode the internal components of the AC unit.

Instead of 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. A Covered Air Conditioner Can Attract Animals

People aren’t the only ones who make plans for winter. Animals that live around your home are also hunting for a warm, cozy place to live for the cold months. For many creatures, a covered air conditioner is an awesome winter home.

Birds, mice, chipmunks and even rats commonly make winter dens inside covered air conditioners. Animals dwelling 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 nest can obstruct airflow and ventilation, limiting the efficiency of the appliance and potentially causing it to overheat. In addition, animal droppings can result in unsanitary conditions and potent 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 pick up and things to repair when winter is over.

4. An AC Cover Restricts Airflow

Another reason not to cover your air conditioning equipment in the winter is because a cover restricts airflow through the unit. Suitable airflow is essential for the AC system because it facilitates heat exchange and enables the unit to cool efficiently. When airflow is severely limited, the system has to work harder to reach the desired temperature, leading to greater energy consumption and strain on the components.

In addition, if you turn on your air conditioning without realizing 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 correct airflow could cause the compressor to overheat, leading to its failure or damage.  That’s why it is crucial to ensure the outdoor unit has no obstructions 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 lots more effective to do a little maintenance for your air conditioner than to cover your outside AC unit.

There are several key maintenance activities you should prioritize to ensure maximum function and longevity of your AC unit. First, it’s a good idea to check your outdoor AC unit regularly and clear any debris such as leaves, twigs and dirt to promote proper airflow. Second, inspect 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 improves efficiency, but it also helps extend the unit’s life span, decreases energy consumption and avoids costly repairs. Rather than using a cover, investing 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.