Toyota Repair: air conditioning, toyota camry, wheather

Question
hi ted, i have a 1992 toyota camry and was wondering how often one should recharge the air conditioning system with k12..does this k12 lose its effectiveness after awhile?    Thankyou...
        justin

Answer
There is no set interval or recommendation as to when the system should be serviced, normally there is nothing to do exept when the system stops cooling properly, I would recommend having the system serviced before going on a long trip in hot wheather.