I got a call, three or four years ago. From a fellow who bought his own
central ac, and realized he didn't really have the skills. Just charged a
trip charge, and hourly labor rate. Got it all installed, and the system ran
fine for a couple days. Came back out, and find that there is some kind of
leak, I was picking up at the evaporator. My fittings looked fine, but I
redid the silver fittings, and put in some refrigerant. Couple days later,
same deal. He was supposed to take the coil in for exchange.
He wasn't really happy with my estimate of three hours labor (about an hour
of that sitting and watching the vacuum pump). Five pounds of juice.
You have a good approach. Of course, a change out means the themostat and
control wires are already run. Condensate drains, and so on. Each install
has a few things which are different.
Christopher A. Young
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