My home is 2100 sq feet single story home 1999 built
It has 2 a/c units Bryant 2 ton and 4 ton with Bryant furnaces.

Furnaces on both are working fine.
2 ton units unit is working fine.
4 ton unit has leaked freon in the ALL STYLE oil, compressor is working fine.

My options are
1) Change the coil now and change compressor down the road (couple of years later) when it breaks on its own and upgarde to puron with compressor change out.
2) Change the coil and replace the compressor (10 seer compressor, 9 years old) and upgrade to Puron now.

How reliable is to clean out the freon system and load it with puron? Do you still get warranty on compressor and/or parts and labor extended warranry with freon to puron upgraded system?

Thanks for listening.