I have a '02 LC with 52,000 miles (32,000 from previous owner) and just this week as the weather began to get hot I noticed the AC was not as strong as last year (and no I did not use it 5 minutes a week like I was suppossed to ) Anyway I took it to the local mechanic (a long time friend of the family) and he "shot dye through it and gave it a recharge" for $150 bucks. What exactially does this mean, and app. how long will it go before it needs another recharge. Is this normal maintenance for a 5 year old LC with 50K miles, or might this be symptomatic of a more serious problem?