Need some advice.
I have an older (nearly 20 years) Lennox AC, 2.5 ton unit. Live in Wis. and have a well insulated house, with lots of shade. Don't run the unit much except to remove humidity. Maybe around a 100 hours a year.
On a recent maint. check found that a capacitor was starting to fail -- lots of buzzing. Suggested that maybe a new unit was in order.
However, after reading some posts here -- many folks refer highly to the reliability of the old Lennox units.
I'm looking for advice on trying to keep to old unit going as opposed to a new unit. Any guidelines or rules of thumb?