No, it is not recommended to recharge an air conditioning system without using a vacuum. Vacuuming is an essential step in the AC recharging process because it helps remove air and moisture from the system.
When an air conditioning system is opened for recharging or repair, air and moisture can enter the system, which can have negative effects on its performance. Air trapped in the system can cause decreased cooling efficiency and can even lead to compressor damage. Moisture can cause corrosion and can also freeze inside the system, blocking the flow of refrigerant.
A vacuum pump is used to create a vacuum within the AC system, which helps remove air and moisture. It also helps identify any leaks in the system by monitoring the vacuum level over time. Once the vacuuming process is complete, the system can be properly recharged with the appropriate amount of refrigerant.
It is recommended to have a professional HVAC technician perform AC recharging and maintenance to ensure proper vacuuming, leak detection, and refrigerant charging. They have the necessary equipment and expertise to handle the process safely and effectively.