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

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

Here, the specialists at Edington Heating & Cooling Inc 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. Snow won’t Hurt Your AC

Outside AC units are supposed to withstand harsh weather conditions like snow in the wintertime. These systems are built with durable materials and hardware that can handle the outdoor elements without damage. The coils and fins of the unit are engineered 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 avoid covering your outdoor air conditioning equipment in the wintertime is because doing so can trap moisture—which is not at all 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 individuals with respiratory issues or allergies. Also, 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. Your Covered Air Conditioning Unit Can Host Animals

Humans aren’t the only ones who make plans for winter. Animals that live around your home are also looking for a warm, cozy place to hide out for the cold months. For many animals, a covered air conditioner is the perfect winter dwelling.

Birds, mice, chipmunks and even rats commonly make homes inside covered air conditioners. Animals living in a covered air conditioner can cause numerous problems. Mice 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 place to get out of the cold weather can impair airflow and ventilation, limiting the efficiency of the AC and potentially causing it to overheat. In addition, animal droppings can result in unsanitary conditions and bad odors.

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

4. A Winter Cover for AC Units Restricts Airflow

Another reason not to cover your air conditioner in the winter is because a cover limits airflow through the unit. Adequate airflow is crucial for the AC system because it facilitates heat exchange and enables the unit to cool effectively. When airflow is restricted, the system has to work harder to achieve the desired temperature, causing greater energy consumption and strain on the components.

In addition, if you turn on your AC 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 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 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 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 inspect your outdoor AC unit regularly and pull out any debris such as leaves, sticks and dirt to allow proper airflow. Second, check 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.

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