Five years ago I had to replace my outside Carrier unit with a Janitrol. The old Carrier size was 2.5 ton, and the replacement was a Janitrol 3 ton. The inside coil is a Carrier 3 ton (Why would an installer mix inside and outside unit sizes?) The piston was never changed or checked to match the configuration. The house cools but not usually below 76-77-78 and upper 40% in humidity. Would matching the piston to the current configuration make a difference in the cooling capability of the system? Unit is installed in an attic 2 story home. Would it be worth the expense to correct this? Would it make a consideralbe difference in the cooling capability?
[Edited by DIY_Greg on 07-13-2006 at 07:15 PM]