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Q: air conditioning pressure valve replacement on 2004 Toyota Corolla

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Will the system need to be vacuum pumped after the new valve is installed before I recharge with 34-a?
(1) Answer
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Unfortunately yes it will need to be evacuated, the switch replaced and then the system recharged with 134a refrigerant.