How do you fix an ac conditioning vacuum leak?

In order to remove all the unwanted moisture and gases from the refrigerant system, a state of near-vacuum has to be achieved in which the pressure in the system is forced to go below the atmospheric pressure. The absolute value of the atmospheric pressure at sea level is given by 29.92 in. Hg or 14.696 psia In the typical system, the vacuum pump is required to create a vacuum. state of about 300 to 500 microns. An electronic vacuum gauge is needed to measure the level of vacuum in the system. Check the specifications of the vacuum pump and make sure that it is able to achieve the vacuum state as required by the manufacturers of the equipment.