An AC vacuum pump removes moisture and air from the air conditioning system before refrigerant is added. It works by creating a low-pressure environment, causing the air and moisture to evaporate at lower temperatures. The pump then expels these vapors, ensuring the AC system is clean and ready for optimal operation. #ACVacuumPump #HVACTechnician #AirConditioning #VacuumPumping #HVACMaintenance #RefrigerantSystem #MoistureRemoval #CoolingSystem #HVACRepair #ACService #acrepairingcourse #CareSkil