As the leaves start to fall in New England, you may be wondering whether you need to cover your outdoor air conditioning unit for the winter. It’s a common question — and the answer depends on your system and your goals.
First, Know What Type of System You Have
If you have a central air conditioner with a separate outdoor condenser, that unit doesn’t need to run during the winter. Heat pumps, on the other hand, often continue to operate through the colder months, so they should never be covered.
If you’re not sure which type you have, check with your HVAC technician before making any changes.
Do Outdoor AC Units Need a Cover?
Manufacturers build outdoor AC units to withstand the elements. Rain, snow, and cold temperatures will not harm a properly installed and maintained system. That said, some homeowners choose to cover their unit to keep out leaves, twigs, and debris.
The risk is in using the wrong kind of cover. A fully sealed or non-breathable cover can trap moisture inside the unit. This encourages rust, mold, and even pest nesting — all of which can lead to costly repairs in the spring.
What About Pests?
Small animals like mice sometimes take shelter inside outdoor units during winter. While a breathable top cover can prevent debris from falling in, it won’t completely stop critters. If pests are a known issue in your area, ask about rodent-proofing options during your fall maintenance.
What’s the Best Approach?
If you want to use a cover, choose one made specifically for AC units. It should be breathable and designed to protect the top without sealing in moisture. Think of it as a leaf guard, not a weatherproof barrier.
Alternatively, you can just check the unit periodically through the winter to remove any debris or snow build-up. Many homeowners skip the cover altogether with no issues.
Don’t Forget Spring Startup
Whether you cover your unit or not, remember to remove any protective gear in early spring and inspect the system before running it. If anything looks damaged or blocked, schedule a service visit before turning it on.
Still Have Questions?
At McKee Energy Services, we’re happy to help you protect your system and make smart choices about seasonal care. Whether you use a cover or not, a little attention now can make a big difference when it’s time to cool things down again.