The indoor coil should match the outdoor unit, not just brand, but
capacity and SEER as well. The manufacturer of the outdoor unit knows
what indoor coils are OK to use. The Aspen coil is an off brand that
is used to match to almost anything, at reduced efficiency most of the
time. In order to determine if the coil needs replaced, they would
actually need to find a leak in the coil. Otherwise they are blowing
smoke.

Stretch