||05-05-2010 12:37 PM
the newer refrigerant has to be run at a higher pressure level on the low pressure side than the older refrigerant. Some times when the conversion is done by someone who doesn't work with AC regularly, the mechanic may not be aware that with the newer gas you need to completly purge the unit and then draw a vacuum on the line so that there is NO air in it at all. With the higher pressure levels any air in the unit will have moisture that will destroy the compressor over a short period of time.
If you had it converted by a certified HVAC technician then that's probably not the problem.