1.5 ton unit (trane) 10 SEER and 4 ton Trane 10 SEER unit, both 11 years old.
1.5 ton unit acting up (freon leak, maybe more issues).
4 ton unit works fine.
Do you recommend replacing the 1.5 ton unit with 15 SEER and keep the old 4 ton unit or do you replace both - especially if you have a good deal to replace both units at the same time?
Thoughts? Location is Florida. Units are sized right.