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28/06/2021 7:22 pm
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If one vacuums the ac line, does the existing r134 get vacuumed out as well?
22002 4 runner
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28/06/2021 9:57 pm
Almost any liquid or gas in the system will be removed, so it will come out. It's illegal to release R-134a into the atmosphere, even though it's harmless to the ozone layer, so don't vacuum it out with a vacuum pump. It's an extreme greenhouse gas, something like 1400x more potent than CO2 if I remember right. Have a shop recover what's in your system if you plan on doing work on it if it's charged.
