This tool works on a 1234yf air conditioning low pressure line to adjust your R134a line. Work 1234yf is VERY EXPENSIVE, yes I put on a 2014 Dodge Caravan, now the air conditioning cools from 42 to 46 degrees, we live in Texas, it is very hot here. YES, you can put R134a in your 1234yf unit, it will not damage your A/C compressor.
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