Why do you use a vacuum pump after repairs?

A vacuum pump is used after repairs to remove any air and moisture from the system, which is crucial for maintaining optimal performance and preventing damage. This process helps create a vacuum that eliminates contaminants, air pockets, and humidity, which can lead to corrosion, reduced efficiency, or system failure. Additionally, it ensures that refrigerants or other fluids can circulate properly, enhancing the overall reliability and longevity of the repaired system.