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Q:

a/c is slow cooling on 2008 Volkswagen Jetta

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
no diagnostic codes but a/c blows warm it seems pressurebhas to build up for it to work and cool
(1) Answer
your ac system might have a leak or just getting low, need to get to shop and get check before charging.