Neglecting pressure testing and leak checking in HVAC refrigeration systems can have severe consequences, including system inefficiency, refrigerant loss, environmental harm, and occupational health hazards. Leaks can also lead to compressor failure, reduced system lifespan, and increased energy consumption. Furthermore, neglecting pressure testing and leak checking can result in non-compliance with safety regulations, leading to fines and penalties. Therefore, it is essential to prioritize pressure testing and leak checking as part of regular maintenance and repair activities.