I have an original 20 year old York Stellar Plus 90% efficiency furnace 120K BTU that now has a rusted condensate pan. Other than that, the heat and a/c (4 ton) have had no problems- house is 2 story single family in Philadelphia area about 2700 sq ft including 2/3 finished basement.
A local NATE tech (happened to specialize in Carrier) gave me 2 options:
Buy a new A-coil (4 ton) R22
A full replacement package: carrier 4 ton 15 seer outdoor unit, carrier performance 93 (120,0000 BTU furnace) and humidifier
Both estimates seemed very high to me- my friends in Ohio just got a brand new full Trane xR90 and similar outdoor unit (their house is slightly bigger than mine) and full cost was 40% less.
I am having another guy come out- unless there is a very cheap fix I don't want to throw away substantial dollars on a this problem only to have to replace the other furnace and outside units soon....
Any guidance or things to consider/look out for??? Thanks!