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22 Eargesplitten posted:Related to Everdave's post, is it still feasible to find a shop that can get old stock of R12 to do a recharge? I'm thinking I might need to take my car to another town to get the AC recharged or converted. AC on vs AC off is maybe 5 degrees difference at this point and it's getting hot. Just convert it. I've done both, a sealed system being recharged with R12 and a formerly R12 system that had been opened and needed repair THEN converted and here in the Florida summer I can't tell the difference between the conversions and not.
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Jun 13, 2022 07:35
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22 Eargesplitten posted:I've been arguing with a friend of mine about acceptable loss of refrigerant over time. He makes rebreathers for SCUBA diving so he's of the opinion that anything designed well will have 0 loss because if you have any leak in a rebreather you die. I say that over a long enough period of time (10-20 years) it's normal to lose some or most of your refrigerant, but I don't have a reason why it's not a perfect seal. I'm thinking maybe the heat cycling causing expansion and contraction at different rates due to the dissimilar materials? Automotive AC systems can be sealed perfectly and will still defuse refrigerant through the various hoses. You don't scuba with R12 or R134.
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Jul 19, 2022 18:18
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22 Eargesplitten posted:So you're saying that the hoses themselves absorb refrigerant over time? I'm not an expert but no, the refrigerant itself it diffuses out of the hoses into the environment. This is completely expected and normal behavior over a long enough timeline. This is why you can still have a completely sealed system that doesn't have any refrigerant in it, still under vacuum.
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Jul 19, 2022 20:12
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