What should always be checked before working on refrigeration systems?

Before working on refrigeration systems, it is essential to check the presence of refrigerant charge. Ensuring that the system is properly charged with refrigerant is crucial for safe and effective operation. A lack of refrigerant can lead to a range of issues, including overheating, inefficient cooling, and potential damage to system components, particularly the compressor. If the refrigerant charge is low, it may indicate a leak or other underlying problems that must be addressed before proceeding with any repairs or maintenance.

While ambient humidity levels, system capacity, and compressor condition are also important factors to consider, the presence of refrigerant charge takes precedence. Without the correct refrigerant level, any work performed could be ineffective or even dangerous, as it may result in further damage to the system or exposure to hazardous conditions. Therefore, confirming the refrigerant charge is a foundational step in ensuring safety and functionality when working on refrigeration systems.