Indoor coil corrosion leading to
coil failure is an issue that affects coils
manufactured by the entire
HVAC industry today. A leading
cause of coil corrosion is formicary acid, an
organic acid that
can be formed in the home.
Although the occurrence rate of these
failures is low nationwide,
some geographic areas have
experienced higher incidence rates. For instance,
some homes
experience multiple
corrosion-related failures while those around them have none.
Failures are
typically characterized by leaks
that form in the fin pack area of the coil after one
to four years of
