I have a 17 year old 3 ton system that has been fine until last week when
tiny leaks were found in the air handler coil. I've been told by one
repairman that we could simply replace the coil, and another has told me
that since the line drop was made of 5/16" copper and all the new copper is
3/8", we need to replace the entire $ystem.
Neither and both.
If you just replace the coil, it's like putting a band-aid on the system.
Why not just replace the entire sustem (inside and out). If it's 17 years
old, you could put a 14 SEER system there and probably cut your cooling bill
Have 3 different companies give you quotes (not estimates! QUOTES!) on a
couple different brands and in a couple different SEERs (12, 14, 16). Ask
your friends and neighbors who they would use. Don't worry about the brand
as much as the installer. If a company does a great job (or should I say a
CORRECT job), you could have it last you for a good 20 years or so.
Bottom line: Don't put any more money into the system you have now. A new
one will pay for intself in no time....
You could just replace the coil, but since your system is at end of the
typical life for A/C if it were me I'd just replace the entire thing.
Find a contractor other than the "repairman" who told you that you need
to replace the entire system because of the lineset size. Either you
misheard what he said or he is B.S.'ing you. The lineset size is
determined by the manufacturer of the condenser and coil and has nothing
to do with obsolesence or the EPA, even. After all, it worked for 17
years, didn't it?
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