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Vacuum air conditioning car.
For effective vacuuming open the low port s valve of the gauge.
Moisture in the ac system is a serious problem because moisture reduces the performance of the ac system and condensation of water can cause the ac system to freeze.
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It is important to vacuum an air conditioning system to remove any air or moisture that may damage the system in the long run.
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When an air conditioning system loses its ability to cool properly it may be necessary to recharge the system with new refrigerant keep reading for a r 134a a c pressure chart and steps on how to recharge the a c system when the system is low on pressure or has been vacuumed out following a repair.
When concerned as to how long to vacuum car ac system you should know that it would take around 30 45 minutes.
This applies to the newer r134a refrigerant systems as well as the older r12 systems.
Vacuums are used to evacuate acs a process by which they pull out all air and moisture from the refrigerant system prior to testing repairs and recharging.