When warm weather starts creeping in, the last thing you want is to find out your car’s air conditioning isn’t working. Your vehicle’s AC system doesn’t just keep you comfortable—it also plays a role in defogging windows and maintaining air quality inside your car. That’s why preparing your system before the peak of the heat is one of the smartest steps you can take.
Here’s how to prevent common auto AC problems and make sure your system runs strong all season long.
1. Run Your AC Early and Often
Don’t wait for a 90-degree day to test your air conditioning. Turn it on during a warm afternoon and let it run for a few minutes. Pay attention to:
- How quickly the air gets cold
- Whether the airflow is strong and steady
- Any strange sounds or smells coming from the vents
Running your AC occasionally—even during cooler months—keeps the system lubricated and helps spot problems early.
2. Check and Replace the Cabin Air Filter
A clogged cabin air filter restricts airflow and can lead to reduced cooling performance. It can also make your system work harder than necessary, which adds wear and tear. If you notice weak airflow or musty smells, your filter may be the culprit. Most filters should be replaced every 12,000 to 20,000 miles—or sooner in dusty or humid climates.
3. Inspect Refrigerant Levels
Low refrigerant is one of the most common reasons AC systems stop blowing cold. Over time, refrigerant can leak out due to aging seals, worn components, or small cracks in the system. A technician can check your system’s pressure and recharge it if needed—along with sealing any leaks to prevent further issues.
4. Check the AC Compressor and Belts
The compressor is the heart of your AC system, and if it’s not working properly, you won’t get cold air. Worn or loose belts can also reduce performance. If you hear squealing or grinding when the AC kicks on, or if it fails to engage at all, have it checked by a professional before it leads to a larger repair.
5. Watch for Signs of Moisture or Mold
Unpleasant odors from your vents could mean there’s mold or mildew buildup in the evaporator or ductwork. This often happens when condensation doesn’t drain properly. A technician can clean the system and ensure the drain is working to prevent moisture-related damage or health issues.