Should You Cover Your Air Conditioner in the Winter? Everything to Know

As the cooler months arrive, you may wonder if you should cover your air conditioner in the winter. However, completely covering your AC unit can cause moisture and rust and attract unwanted critters. Instead, use a partial, breathable cover during the fall to prevent debris from entering your unit, and leave the AC uncovered in the winter. Here’s everything you need to know about covering your AC unit in the winter. 

Should I Cover My AC in the Winter?

You should not cover your AC unit in the winter because it can lead to moisture buildup and rust and attract unwanted critters—all of which could damage your unit. The condenser on your outdoor AC is made of a durable metal that is designed to withstand winter weather, including snow, hail, sleet, and rain. If you have large icicles that could fall into your unit, remove the icicles periodically or use a sturdy top cover or piece of wood to prevent icicles from damaging your unit. 

If you have trees and other shrubbery around your AC unit, you can use a cover in the fall to protect it from sticks, leaves, and other debris. Choose a breathable cover, which costs $15 to $40 from a hardware or home improvement store. Covers that don’t allow moisture to dissipate can cause condensation on the interior of an AC unit, leading to rust and corrosion.

AC Units Need Covers When:

• There are leaves and other debris falling on the housing or inside it.

• There is a buildup of snow or ice that can freeze inside the housing.

• Snow and ice are falling from the roofline and could fall into the AC unit from above.

AC Units Should Remain Uncovered When:

• There is no danger of snow or ice buildup.

• It is protected and away from trees that can shed leaves and twigs onto the housing.

• The unit is wet from being cleaned or from the weather.

Pros and Cons of AC Covers

Take a look at the good and the bad of using AC covers.

Maintaining Your AC Unit and HVAC System

You may not need to add a cover to your AC unit, but maintenance is a must. Year-round maintenance can help lower energy bills, improve your home’s air quality, and increase the life span of your HVAC system. Depending on your skills and experience, you can perform some HVAC maintenance, including: 

• Checking and replacing filters 

• Cleaning your AC coils 

• Checking the drain line for clogs

But if you're unsure about how to complete these tasks, hire a local HVAC expert to help. HVAC maintenance costs between $450 and $1,000 for an AC tuneup.