As temperatures drop and snow appears in the forecast, many homeowners wonder how best to take care of their air conditioning unit during the colder months. Should you cover it or leave it open to the elements? Should I change its air filter before I turn it off for the season, or should that kind of maintenance be done when I’m ready to turn it on again in the spring? 

We hear these questions all the time at Elite Comfort Systems, and that’s why we’ve created this short air conditioning fall/winter guide. So, let’s jump in and take a closer look at AC unit maintenance and what you can do to take care of your machine during its off-season…

Do You Need to Cover Your AC Unit for Winter?

If your home has a central air conditioner, covering it for the winter is optional. Modern outdoor AC units are built to handle the elements—snow, rain, ice, and freezing temperatures included.

Using an AC unit cover for winter can add an extra layer of protection against:

• Falling leaves and branches
• Dirt and debris
• Ice buildup from freezing rain

If you choose to cover your air conditioner for winter, it’s important to avoid covering the entire unit, as a fully covered unit can trap moisture inside. Never use a fully sealed plastic or waterproof cover, as it can trap moisture and cause rust or mold. 

The Right Way to Cover an Outdoor AC Unit

If you choose to use an outdoor AC cover, look for one that’s breathable and designed specifically for HVAC use. Mesh-style covers are a great choice because they protect your unit from debris while still allowing airflow. 

Here are a few quick tips for covering your outside air conditioning unit safely:

• Only cover the top: Not the sides or the entire unit. Avoid placing a cover over the entire unit; a simple waterproof top cover or even a piece of plywood secured with bungee cords can work.
• Leave room for ventilation: To prevent trapped moisture from damaging your unit, ensure there is sufficient space for air to circulate. 
• Remove the cover before spring: When it’s time to turn your AC back on, don’t start your unit until you have removed the cover. 

Alternative Protection Methods for Air Conditioning Units

If you’re looking for ways to protect your outdoor air conditioning unit during Idaho’s harsh winters—or any season—there are several effective alternatives to using a traditional air conditioner cover. These methods help safeguard your unit from extreme weather, debris, and other natural elements, all while ensuring proper airflow and preventing further damage.

Here are some smart ways to protect your air conditioning unit:

• Schedule Regular Maintenance: Keeping up with routine maintenance is one of the best ways to protect your air conditioning unit. Regardless of the time of year, it’s essential to clean or replace the air filter, remove any dirt or debris from the condenser coils, and inspect all components for signs of wear. Regular maintenance helps your unit withstand the elements and keeps it running efficiently.
• Trim Nearby Trees and Shrubs: Overhanging branches and dense shrubs can drop leaves, twigs, and other debris onto your outdoor unit. By trimming back vegetation around your air conditioner, you’ll prevent leaves and branches from clogging the coils or blocking airflow.
• Install a Mesh Screen: A mesh screen placed over the top of your outdoor unit can help prevent leaves and other debris from falling inside, while still allowing for proper airflow. This is a simple, effective way to protect your condenser without restricting air movement or trapping moisture.
• Add a Protective Cage: For extra protection, especially in areas with wildlife or high foot traffic, consider installing a protective cage around your air conditioning unit. This can help keep out animals and larger debris, while still allowing the unit to breathe.
• Apply a Weather-Resistant Coating: Some homeowners choose to add a weather-resistant coating to the exterior of their condenser. This extra layer can help prevent corrosion and rust caused by snow, rain, and other harsh weather conditions.

These alternative protection methods are designed to keep your air conditioning unit safe from damage, without blocking airflow or causing moisture problems. Remember, most modern air conditioners are built to withstand extreme weather, but a little extra care can go a long way in extending the life of your system.

If you’re unsure which protection method is best for your specific unit or have questions about installation or maintenance, don’t hesitate to contact Elite Comfort Systems. We can help you choose the right solution for your home and ensure your air conditioning system is ready for whatever Idaho weather brings.

What About Heat Pumps?

If your home has a heat pump installed outdoors, do not cover it in the winter. Outdoor heat pumps are designed to provide both heating and cooling for your home year-round, and covering them can block airflow and cause serious damage.

Instead, just keep the area around your outdoor heat pump clear of snow and debris. If you’re concerned about buildup, you can use a breathable heat pump cover that allows for full airflow; however, it’s usually not necessary.

Are Air Conditioner Covers Necessary in Idaho?

For most Idaho homeowners, AC covers aren’t required—but they can help extend your system’s lifespan when used correctly. Outdoor units and other HVAC equipment are specifically designed to withstand Idaho’s weather conditions, but additional protection may still be beneficial in certain situations.

While practices for protecting outdoor units may vary across the country, in Idaho, protecting your house’s outdoor units from debris and snow is especially important. If your outdoor unit is located under trees or in an area where wind tends to blow dirt and debris, using an outdoor AC cover for winter can help prevent buildup inside the unit.

Our local weather here in Idaho Falls, Rigby, Rexburg, and the surrounding areas brings plenty of snow and wind, so a little extra protection can go a long way.

Common Questions We Hear

Can you cover an outdoor air conditioner unit?

Yes—just make sure the cover is breathable and only used in the off-season.

Are mesh air conditioner covers a good idea?

Absolutely! Mesh covers protect your unit from debris while letting moisture escape. Always choose a cover designed for proper ventilation.

Should you cover your AC unit in summer?

No, your air conditioner needs full airflow while it’s running. While direct sunlight can cause the unit to work harder, covering it in summer is not recommended as it restricts airflow and can lead the machine to overheat.

Can covering my AC unit cause humidity problems?

Yes, improper covers can trap humidity inside the unit, leading to rust, corrosion, and even mold growth. Always use a breathable cover to prevent moisture buildup.

Elite: The Local HVAC Experts You Can Trust

At Elite Comfort Systems, we know Idaho weather—and we know how to keep your HVAC system running strong all year long. Our team has the capability to assess, maintain, and protect your outdoor AC unit so that it can perform at its best. Whether you need seasonal maintenance, a system tune-up, or help deciding how to protect your outdoor unit, our friendly, professional team is here to help.

We take pride in offering transparent pricing, easy scheduling, and reliable service for homeowners across Eastern Idaho, including Idaho Falls, Rigby, Rexburg, and the surrounding areas. Contact Elite Comfort Systems today to get your home and AC unit ready for winter.