I have a 3 year old Trane XL14i. The evaporater coil / air handler is in the attic here in south Florida (fairly common). Now that it is cooler, I opened it up to clean the blower and just inspect everything. I removed the side panel to the air handler and the galvanized triangular panel on the A-coil. The bottom half of the A- coil sides are full of rust.
Anyway, the parts have a 10 year warranty, but labor was only 2 years. I fear the entire A-coil is going o rust away within a few years. Should I get it replaced now or wait until there is a cooling problem? Is there anyway I can stop the rust? I know enough about corrosion to know my "fix" could make things worse (ie., the copper coils could start to corrode instead of the steel).
Thanks in advance.