What can moisture in an A/C system lead to when combined with R12?

Moisture in an A/C system that combines with R12 can lead to the formation of an acid that causes corrosion. This reaction occurs because moisture can break down the refrigerant and react with it, resulting in the creation of hydrochloric acid and other corrosive substances. These acids can corrode various components of the A/C system, including metal parts like the evaporator and condenser coils, as well as the compressor, leading to premature failure and leaks.

Maintaining the integrity of the refrigerant system is essential for efficient and safe operation. Therefore, it's crucial to keep moisture out of the system by ensuring proper handling and refrigerant charging practices. The presence of moisture not only affects system components but can also severely impact the overall reliability and performance of the air conditioning system.