Most of what I see with tin cans are small display and storage cases. Lots of fix work, but when it's time for replacement, no work for me.
For me, it's 5 to 15 ton splits, and RTU's up to about 25 tons.
Compressors? Lot's of em. Two last week alone.
I know what you mean about the display cases. Unless the store has a change-out arrangement where they just cart in a different case, we usually replace the entire condensing unit. Once, I replaced a capillary tube. Other stores just send them to a warehouse and send out one that works.
[Avatar photo from a Florida training accident. Everyone walked away.] 2 Tim 3:16-17