RE: [DML] Re: recharging my R-12 system with R-416A (another update on #
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RE: [DML] Re: recharging my R-12 system with R-416A (another update on #2613)

In a 27 year old system I'd expect it could leak anywhere, but also be
advised that the original hoses were not designed for 134a, which can
very slowly weep out through the hose itself, almost at a molecular
level as I understand it.


You could refill with Freeze 12 yourself, some of the vendors sell it
and you can find it in some auto parts stores and on ebay.


You can also legally buy R12, off of ebay for example, if you take a 20
minute open book test on the internet and get "certified".  At $30 a can
its expensive though.


Freeze 12 is a R12 substitute which is actually a bend of other
refrigerants, but it is still more than half 134a.  As such I'd expect
that although freeze 12 is compatible based on its properties under
Boyles law (expansion, compression, thermal characteristics) it will
likely weep out too.  Over the long term the mix in the system may shift
as well if for example only the 134a weeps out, as you keep adding FR12
it would eventually change the balance of compounds, leaving more of the
other, non weeping gasses in higher concentration.


This is speculation...


From: Elvis
Subject: [DML] Re: recharging my R-12 system with R-416A (another update
on #2613)

Thanks Tom, 
tis is the correct way to go, but before refilling it I'd 
like to replace suspicious parts first.


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