How often should pressure testing and leak checking be performed in HVAC refrigeration systems?

The frequency of pressure testing and leak checking in HVAC refrigeration systems depends on various factors, including system usage, age, and maintenance history. As a general rule, pressure testing and leak checking should be performed during initial system installation, after major repairs or modifications, and as part of regular maintenance schedules. Additionally, HVAC professionals should perform pressure testing and leak checking whenever they suspect a leak or system malfunction.