What type of leak is most prevalent in refrigeration systems?

Fitting leaks are the most prevalent type of leaks found in refrigeration systems primarily due to the multiple connections and joints required to form a complete refrigeration circuit. As systems are installed and operated, vibration, thermal cycling, and the continuous pressure variations can lead to the loosening of these fittings over time.

Additionally, the materials used to create these fittings, such as copper or threaded joints, can also contribute to wear and potential failure points. Such leaks often manifest as small drips or gas escapes that can go unnoticed for a longer period compared to leaks from other components, which may be more easily monitored and maintained.

In contrast, while compressor, condenser, and evaporator leaks do occur, they are typically less frequent than leaks at fittings. Compressors can leak due to seals and gaskets but are usually designed to be robust against failure. Condensers and evaporators, being integral parts of the system, often have fewer connections compared to the numerous fittings present throughout the system. Thus, while all types of leaks can be a concern, fitting leaks stand out as the most common cause of refrigerant loss in refrigeration systems.