5 Reasons to Not Cover Your Air Conditioner in the Winter

As the sweltering summer sunshine starts to fade and the cooler temperatures of fall starts to settle in, residents of Omaha 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 smart idea, the truth 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 actually cause problems.

Here, the professionals at The Frazier Company 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 designed to withstand harsh weather conditions like snow in the wintertime. These systems are built with sturdy 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 elements 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 wintertime is because doing so can trap moisture—which is the opposite of what you want in your outdoor unit. That’s because sealing moisture inside the unit generates 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. 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 clear of debris, allowing for efficient airflow and preventing moisture buildup.

3. Covered AC Systems Can Host Animals

Human beings aren’t the only ones who prepare for winter. Animals that live around your home are also searching for a warm, cozy place to live for the cold months. For many animals, a covered air conditioner is an ideal winter refuge.

Birds, mice, chipmunks and even rats frequently make nests inside covered air conditioners. Animals living in a covered air conditioner can cause many problems. Rats can chew through wires, insulation and other components, causing damage that may require costly repairs. Debris animals bring into the AC to construct a warm and comfortable bed can block airflow and ventilation, decreasing the efficiency of the unit and potentially causing it to overheat. Additionally, animal excrement can result in unsanitary conditions and potent odors.

Leaving your air conditioner uncovered helps dissuade animals, because an uncovered AC gives them less shelter from chilly temperatures than a covered unit. That’s better for your air conditioner—and leaves you with less mess to pick up and things to repair once the snow melts.

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 restricts airflow through the unit. Suitable airflow is vital for the AC system because it facilitates heat exchange and permits the unit to cool efficiently. When airflow is restricted, the system has to work harder to achieve the desired temperature, leading to increased energy consumption and strain on the components.

In addition, if you use your air conditioner without noticing 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 appropriate airflow could cause the compressor to overheat, resulting in its failure or damage.  That’s why it is crucial to ensure the outdoor unit is free from blockages 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 much more effective to do a little maintenance for your cooling system than to cover your exterior AC unit.

There are a number of key maintenance projects you should prioritize to ensure the best possible function and longevity of your AC unit. First, it’s wise to inspect your outdoor AC unit regularly and remove any debris such as leaves, small branches 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 hinder efficient heat exchange or airflow.

Regular air conditioning maintenance not only enhances efficiency, but it also helps extend the unit's life span, reduces energy consumption and prevents 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.