There is a good place at pattiya junction just before the over head bridge name AIR FROST. They are the people Who did all Honda A/C works before the agent got the facility in 90's. Abouit 10 yuears ago , my ek3 A/C condeser was changed to a bigger one and did complete overhaul and worked fine till i sold the car after 3 years.They have spares as well.