Regular inspections and maintenance are critical to preventing refrigerant charge issues. The frequency of inspections depends on the system’s usage, age, and operating conditions. As a general rule, HVAC systems should be inspected at least twice a year, with more frequent inspections recommended for systems operating in harsh environments or under heavy loads. During these inspections, HVAC professionals should check for signs of refrigerant leaks, inspect system components, and perform routine maintenance tasks, such as cleaning coils and replacing air filters.