Most drivers only think about their air conditioning when summer rolls around. But your car’s AC system is more than just a cooling unit—it also plays a big role in defogging windows, keeping air fresh, and maintaining overall system health during the colder months. Here’s how to keep it in good shape, even when you’re not using it for cold air.
Run the AC Periodically
Even in winter, it’s smart to run your air conditioning system for at least 10–15 minutes once a week. This helps keep the compressor lubricated, prevents seals from drying out, and reduces the risk of refrigerant leaks. Running the AC also helps the system clear humidity from the cabin, which keeps your windows from fogging.
Use the Defroster Regularly
Your car’s defroster often works in tandem with the AC system. When you turn on the defroster, the AC helps remove moisture from the air, speeding up the process of clearing condensation or frost from the windshield. Using it regularly keeps the system active while improving visibility.
Check the Cabin Air Filter
The cabin air filter is responsible for filtering dust, debris, and allergens before air enters your vehicle’s interior. During colder months, when the heater and defroster are working overtime, a clogged filter can restrict airflow and put extra strain on the AC system. Replacing it as needed ensures clean air and proper ventilation.
Watch for Warning Signs
Even in winter, your AC may show signs of trouble. Musty odors can point to mold or bacteria in the system, while weak airflow or unusual noises could signal mechanical issues. Catching these problems now prevents costly repairs when warmer weather returns.
Schedule a System Check
It’s a good idea to include your AC system in seasonal maintenance. A professional can check refrigerant levels, inspect belts and hoses, and test overall performance to ensure the system is ready for both winter defrosting and summer cooling.
Final Thoughts
Your car’s air conditioning system isn’t just for summer comfort—it’s a year-round tool that helps maintain visibility, cabin air quality, and system reliability. By running it periodically, checking filters, and scheduling seasonal inspections, you’ll keep your AC in top shape during the cold months and ready to perform when the heat returns.