Should you Cover Air Conditioners in winter?

As cold weather arrives, homeowners wonder whether they should cover their air conditioner in winter. It may feel natural to wrap your A/C tightly to protect it from snow and ice, but doing so can actually cause more harm than good. Before you reach for that full cover, here’s what you need to know.

When the condenser is wrapped tightly, moisture gets trapped inside the unit. Without airflow, it becomes a dark, damp environment perfect for mold, rust, and corrosion.  Even in cold temperatures, weather fluctuations create condensation under the cover, and without ventilation, that moisture has nowhere to escape

A fully covered air conditioner creates a warm, sheltered space for mice, squirrels, and other small animals. These pests often chew on wires, insulation, drains and this can lead to costly internal damage that is not covered under most manufacturer warranties.  Improper covering is one of the quickest ways to void an A/C manufacturer warranty. Always check your unit’s manual for approved winter protection guidelines.

If the air conditioner accidentally turns on while wrapped-common with shared thermostats or heat pump settings-the restricted airflow can cause the unit to overheat, damaging the compressor and voiding the warranty.

But Isn’t Snow Bad for the AC?

Surprisingly---NO!   Modern air conditioners are built to manage rain, snow, ice, winter temperatures.  Units are designed with components that allow water and ice to drain off naturally. Airflow during warmer days helps evaporate moisture and keeps internal parts dry.

The only type of Cover experts recommends, and manufacturers agree is a breathable top. A top cover protects the unit from falling ice, ranches, heavy debris without trapping moisture or attracting pests.

Winter Tips for Your A/C Condenser:

• --Clear leaves and debris from around the condenser
• --If snow piles up, gently brush it off (never use a shovel)
• --Use a top-only breathable cover if desired
• --Never wrap the unit tightly in a full cover or tarp

Need HVAC maintenance, John’s Home Comfort Heating & Cooling is here for you.

📞 Call JHC at 416-881-5425
We’re happy to help keep your home comfortable all year round. Comfort Starts Here!