just a quick guess, but its probably the o rings on the compressor. Either way you will need someone to recover and add the dye into your system and charge. Probably takes around .65kg.

Better yet, just have the dealer not some outside aftermarket company "try" to fix it cause you will end up back there with more problems. Have the dealer check it out. Let them diag it go from there. It will cost you either way. Ac work is not cheap but easy to fix.

Reason I say take it to a dealer is because alot of these aftermarket places don't know shit about ac and the importance of not contaminating your system. Letting moisture in etc.. all can effect your "how cold it gets" or performance of the ac system. On honda's you should be running about 42 degress. with the doors shut running for around 15mins. Get yourself a ac temp gauge.