Hello, My unit froze up the other day, a tech came out and diagnosed a leak in the evaporator coil. It's a 5 ton Trane model TWH060P150F0, about 11 years old and located in the attic. The outside unit was replaced
6 years ago because of a lightning strike. The tech said the coil was aluminum and could not be repaired. He gave me 2 options, replace coil $1676 or replace entire air handler $2779. I would like to know, first are these price quotes reasonable? And should I replace just the coil or the whole unit?TIA Rick