Turning Off AC for Winter? Avoid This Major Mistake to Prevent Costly Damage

Air conditioners that run day and night during summer are often shut down for months as winter approaches. Many people simply turn off the main power switch without any cleaning or inspection. However, this negligence can cause severe issues when you turn the AC back on next summer, such as bad odors, water leakage, low cooling, or gas leaks. By following a few simple steps, you can protect your AC and increase its lifespan.

Why Cleaning Filters Before Shutting Down AC is Crucial

The filters in a split AC unit trap dust and small particles from the room. After prolonged use, significant dust accumulates on them. Leaving them uncleaned for months can breed bacteria and cause unpleasant odors when restarted.

Before cleaning, make sure to disconnect the power supply. Open the front panel, remove the filters, and use a vacuum cleaner or wash them gently with water, letting them dry completely before reinstalling.

How to Dry Internal Moisture and Manage Power Supply

When an AC runs, moisture accumulates inside the indoor unit due to cooling. Many manufacturers recommend running the AC in 'Fan Only' mode for a few hours before a long shutdown to dry the internal parts. Afterward, turn off the main circuit breaker to save electricity and prevent accidental startups.

Should You Cover Indoor and Outdoor Units?

It is not strictly necessary to cover the indoor unit; simply wipe it with a clean cloth. If you do use a cover, ensure it allows ventilation and doesn't trap moisture. For the outdoor unit, clear away surrounding dust and leaves. However, completely wrapping units in plastic or heavy cloth isn't recommended for every model, so always check your user manual. Also, remember to remove the remote's batteries to prevent leakage.