As the hot summer heat starts to fade and the relief of fall starts to settle in, residents of Bartlesville 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 conditioner for the winter.

While it may seem like a smart idea, the reality is there are several reasons why you shouldn’t cover your AC unit in the winter. Along with not being necessary, covering your outdoor air conditioning equipment can even cause problems.

Here, the specialists at Farris Heating & Air 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

Outside AC units are built to withstand harsh weather conditions like snow in the winter season. These units are built with sturdy 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 designed to protect the internal parts 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 spread.

Mold and mildew not only have an undesirable aroma, but they can also pose health risks, especially for household residents with respiratory issues or allergies. Plus, the excess moisture can corrode the internal components of the AC unit.

Instead of covering the unit, instead make sure the unit has proper drainage and keep the area around the unit cleared 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 hide out for the winter months. For many creatures, a covered air conditioner is the perfect winter refuge.

Birds, mice, chipmunks and even rats commonly make nests inside covered air conditioners. Animals residing in a covered AC unit can cause several problems. Mice can chew through wires, insulation and other connections, causing damage that may require costly repairs. Debris animals bring into the AC to make themselves a warm and comfortable home can block airflow and ventilation, reducing the efficiency of the unit and potentially causing it to overheat. In addition, animal waste can result in unsanitary conditions and potent odors.

Leaving your air conditioner uncovered helps discourage animals, because an uncovered AC offers less shelter from cold weather than a covered unit. That’s better for your air conditioner—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 AC unit in the winter is because a cover blocks airflow through the unit. Suitable airflow is essential for the AC system because it assists heat exchange and permits the unit to cool efficiently. When airflow is restricted, the system has to work harder to reach the desired temperature, causing additional energy consumption and strain on the components.

In addition, if you turn on your air conditioning 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 shortage of proper airflow could cause the compressor to overheat, resulting in its failure or damage.  That’s why it is vital to ensure the outdoor unit is always cleared of any obstructions 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 a whole lot more effective to do a little maintenance for your cooling system than to cover your outside AC unit.

There are a number of key maintenance projects you should prioritize to ensure maximum operation and longevity of your AC unit. First, it’s wise to examine your outdoor AC unit regularly and clear any debris such as leaves, small branches and dirt to maintain 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 efficient heat exchange or airflow.

Regular air conditioning maintenance not only boosts efficiency, but it also helps extend the unit’s life span, decreases energy consumption and avoids costly repairs. Rather than using a cover, putting time and effort into routine air conditioning maintenance is a proactive approach that can greatly benefit your entire HVAC system in the long run.