> And just BTW, it's a violation of federal law to service A/C
> without a license.
Sorry not correct...
It requires a federal license (fairly easy to get) to purchase R12, and the
law requires that all R12 be evacuated from an AC system and recycled instead
of venting it to the air.
However, anyone can buy R134a and although it is strongly recommended that it
be recycled when you empty a system it is not absolutely required and there is
no penalty for not recycling R134a.
Suggested annual donation $12.96