The Importance of Using Your Car's AC and Heater Regularly

Many people wonder if it is beneficial to run their in-car air conditioning (AC) or heater regularly. While it is not strictly necessary, the regular use of these systems ensures optimal performance and prevents a variety of issues. This article explores the benefits and potential consequences of not using your car's AC or heater regularly.

System Degradation

The air conditioning system, similar to other mechanical components in a vehicle, benefits from regular use. The AC system includes components that rely on lubrication and protection from environmental factors. Frequent use helps keep these components lubricated and seals from drying out. Conversely, infrequent use can lead to leaks and reduced efficiency. Regular operation of the AC system ensures that these essential parts remain in good condition, preventing potential issues.

Mold and Mildew Growth

Air conditioning systems are equipped to handle large volumes of air and can easily collect moisture. If the AC is not used, this moisture can accumulate, leading to the growth of mold and mildew. These microorganisms can produce unpleasant odors and affect air quality, making the environment in your car less comfortable. Additionally, mold and mildew can pose health risks, as breathing in spores can cause allergies and respiratory issues.

Defrosting Issues and Visibility

The heater, on the other hand, is crucial for defrosting the windshield during cold weather. Not using the heater can lead to reduced visibility, which is particularly dangerous in snowy or rainy conditions. Ensuring that the heater is used regularly can prevent ice and snow from freezing onto the glass, maintaining clear visibility for safer driving.

Climate Control Familiarity and Safety

Regular use of the AC and heater also helps you become familiar with how these systems operate. This familiarity is important for maintaining a comfortable environment inside the vehicle and ensuring safety. Being aware of the mechanisms and features of your AC and heater allows you to make quick adjustments if needed, such as in the event of a malfunction, thereby enhancing overall safety.

Potential Electrical and Mechanical Issues

In addition to the problems caused by lack of use, some components in the AC and heating systems may develop issues if not used regularly. For example, the O-rings in the AC system can dry up, crack, and start leaking. Regular use of the AC, even for short periods, ensures that these critical components remain in good condition. Similar issues can arise in the heating system, where moisture can accumulate and lead to mold, mildew, and rust, which can be particularly damaging to the vehicle's interior and exterior.

ASE Mechanic Perspective

As an ASE-certified mechanic with over three decades of experience, I have seen numerous cases where the lack of regular use of the AC or heater has led to maintenance issues. For instance, many clients come in with air conditioning that is not cooling, and upon investigation, I often find that they have not run the AC during the winter months. The O-rings, which are crucial for the proper functioning of the AC system, tend to dry up and crack if not used, leading to leaks. Similarly, not running the heater can cause moisture to accumulate, leading to mold, mildew, and rust, which can damage the vehicle over time.

Conclusion

While it is not strictly necessary to use your car's AC and heater regularly, doing so offers numerous benefits. Regular use ensures system health, prevents issues like mold, mildew, and rust, and keeps you familiar with how these systems operate. It is advisable to run the AC at least once a week for about twenty minutes to maintain its efficiency. The same principle applies to the heater, especially during cold weather. Regular use is essential for maintaining a comfortable and safe driving environment.