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

While it may seem like a great idea, the fact is there are many reasons why you shouldn’t cover your AC unit in the winter. Along with not being something you need to do, covering your outdoor air conditioning equipment can actually cause problems.

Here, the experts at Tri City Fuel & 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. Snow won't Hurt Your AC

Outdoor AC units are built to withstand harsh weather conditions like snow in the winter season. 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 crafted to protect the internal components from moisture and debris.

2. Covering AC Systems can Encourage Mold

One of the reasons you should avoid covering your outdoor air conditioning equipment in the cold months is because doing so can trap moisture—which is not at all 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 spread.

Mold and mildew not only have an unpleasant smell, but they can also pose health risks, especially for people with respiratory issues or allergies. Also, the excess 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 clean of debris, allowing for efficient airflow and preventing moisture buildup.

3. Your Covered Air Conditioning Unit Can Host Animals

Human beings aren’t the only ones who get ready for winter. Animals that live around your home are also looking for a warm, cozy place to crash for the winter months. For many creatures, a covered air conditioner is the perfect winter dwelling.

Birds, mice, chipmunks and even rats often make nests inside covered air conditioners. Animals residing in a covered air conditioning unit can cause numerous problems. Rats can chew through wires, insulation and other components, causing damage that may require expensive repairs. Debris animals bring into the AC to create a warm and comfortable nest can impair airflow and ventilation, decreasing the efficiency of the appliance and potentially causing it to overheat. Additionally, animal excrement can result in unsanitary conditions and bad odors.

Leaving your air conditioner uncovered helps discourage animals, 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 when winter is over.

4. An AC Cover Restricts Airflow

Another reason you shouldn't cover your air conditioner in the winter is because a cover restricts airflow through the unit. Proper airflow is vital for the AC system because it helps with heat exchange and allows the unit to cool properly. When airflow is severely limited, the system has to work harder to reach the desired temperature, resulting in increased energy consumption and strain on the components.

In addition, if you use your AC without knowing 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 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 free from blockages 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 conditioning unit than to cover your outdoor AC unit.

There are numerous key maintenance activities you should prioritize to ensure maximum function and longevity of your AC unit. First, it’s wise to look at your outdoor AC unit regularly and get rid of any debris such as leaves, sticks and dirt to promote proper airflow. Second, examine and clean the coils, fins and filters to make sure they are free from dirt and dust buildup that would prevent efficient heat exchange or airflow.

Scheduled air conditioning maintenance not only enhances efficiency, but it also helps extend the unit's life span, reduces energy consumption and avoids costly repairs. Rather than using a cover, putting time and effort into routine air conditioning maintenance is a proactive plan of action that can substantially benefit your entire HVAC system in the long run.