I was on the phone yesterday with a company that makes custom copper evaporator coils, I need to start changing out some old Chrysler Airtemp evap coils, all of them 15 tons. Chrysler has been out of business for years and years, so I have to get them made for the units.
I did one a few years ago, man what a job, they are actually two 7.5 ton coils joined together in a slab with two TXV's and a distribution copper tube system.
You can see the bottlom coils tube turns showing rust, there are hundreds of teeny holes there slowly leaking. You can't repair them the tubing is so thin because of moisture, corrosion and dielectric conversion.
The fan motors are a challenge to change out as well, gravity is not my friend there...
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