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My A/C evaporator coil iced over last fall and this spring and again
mid-summer I had to have it refilled. I had a technician check it for leaks
and the evaporator coil leaks.
When the tech had the duct open, I noticed that the coil had a sticker on it
(model, serial number, max pressure) that said "Refrigerent: R-22".
My system uses R-410a which I am pretty certain is double the pressure of
R-22. I asked the tech about this, and he said it probably shouldn't have
been installed, although two of his calls to a supervisor and another
employee seemed to indicate it was "OK" because either (A) it had a
regulator gizmo installed on it or (B) because that coil was "OK" for
R-410a.
I am out of warranty by about 9 months and I may get this as a warranty issue
because the coil wasn't specifically labeled for R-410a use. I understand
that coils usable with both R22 and R410a are commonly used now, but I want
to bet that they're actually designed that way from the get-go. And that
mine was installed as way to avoid having to use a more expensive R-410a
coil, with a kludge to deal with the higher pressure.
The question is will I be able to actually make this argument when I am not
an A/C technician, or I suppose more importantly, is it even a valid
argument?
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Central AC evaporator coil has leak
