As the cold weather rolls in, many homeowners start preparing their homes for winter —
draining outdoor faucets, sealing windows, and checking furnaces. But one question comes up
every year: Should you cover your air conditioner for the winter?
The short answer? It depends — and we’re here to break it down for you.
Why You Should Cover Your AC Unit
While central AC units are designed to withstand the elements, there are still a few valid reasons
why you might want to cover your unit:
- Protection from Falling Ice or Debris
In areas with heavy snowfall or ice storms, icicles or tree limbs can fall and damage the exterior
of your unit. A cover adds an extra layer of protection from physical impact. - Prevent Leaves and Debris from Getting Inside
A well-fitted top cover can help prevent leaves, twigs, and dirt from collecting inside the unit,
which could clog coils or attract moisture and mold.
Why You Shouldn’t Cover Your AC Unit
While it may seem logical to shield your AC from the cold, covering it completely can cause
more harm than good.
- Moisture Traps Can Lead to Rust
A full cover can trap moisture inside your unit. This creates a damp environment, leading to rust
and corrosion of internal components — defeating the purpose of protecting it. - Covers Can Attract Pests
Covers provide warm shelter for rodents and insects looking to escape the cold. These pests can
chew through wiring or nest in the unit, causing serious damage.
So, What’s the Best Practice?
If you’re set on covering your AC unit, we recommend:
- Using a top-only cover (not a full wrap)
- Choosing a breathable, waterproof material
- Clearing snow and debris from the top regularly
But for most homeowners, it’s perfectly safe to leave your unit uncovered. These systems are
built tough — and a little snow won’t hurt them.
Bonus Tip: Shut Off the AC Breaker
If your AC has a dedicated breaker or disconnect switch, it’s smart to shut it off for the season.
This prevents the unit from accidentally kicking on during a warm spell.
Need Help with Winter Prep?
At BMB & Sons, we help homeowners across South Jersey prepare their homes for every season
— from furnace tune-ups to winterization checklists. If you ever have questions about HVAC
care, give us a call or visit bmbsons.com.
