How to Protect Your AC Unit From Snow and Ice

Winter weather can quietly damage outdoor air conditioning units if they're left unprotected. Snow buildup, ice formation, and falling debris all put stress on components that are expensive to repair or replace.

The goal of winter protection is simple: reduce physical damage while avoiding trapped moisture. Unfortunately, many well-meaning homeowners do the opposite.

What Winter Weather Does to Outdoor AC Units

• Snow and ice add weight to fan blades and grilles
• Moisture accelerates corrosion of coils and electrical parts
• Freeze-thaw cycles weaken metal components
• Debris and small animals can enter uncovered units

While AC units are designed for outdoor use, prolonged winter exposure still shortens their lifespan.

The Wrong Way to Protect an AC Unit

Wrapping an AC unit tightly in plastic, tarps, or shrink wrap may seem logical, but it often causes more harm than good.

• Trapped moisture promotes rust and mold
• Lack of airflow prevents evaporation
• Condensation builds up inside the unit

Many HVAC manufacturers specifically advise against fully sealing condenser units.

The Right Way to Protect an AC Unit in Winter

The safest approach is to use a breathable AC cover that blocks debris while allowing air circulation.

• Use mesh or vented covers designed for winter use
• Cover only the top or upper sides of the unit
• Secure the cover to prevent wind movement
• Remove heavy snow buildup when possible

Breathable covers reduce debris and snow accumulation without creating a moisture trap.

Do You Need to Cover Your AC Unit Every Winter?

In mild climates, covering may not be necessary. In regions with heavy snowfall, ice storms, or falling debris, a breathable cover provides extra protection.

If you're unsure what size cover you need, check out our AC cover buyer's guide for measuring instructions.

Final Takeaway

Protecting your AC unit during winter doesn't require sealing it in plastic. Focus on airflow, debris protection, and proper fit to avoid damage while extending the life of your system.