On Fri, 18 Aug 2017 11:44:06 GMT, Jennifer
m wrote:

Our refrigerator got compressor replaced in Feb. Now it's not working again.
The technician now says there is Freiburg leak and because the original
refrigerator had copper tubing, it's difficult to weld,. He suggested us to
change to whole coil. What does it mean?
You don't "weld" copper - you braze it - and it is pretty simple.
You can also solder copper - which is a lot easier - but is not
recommended (or possibly even allowed) for refrigeration lines.