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Yup...R12 originally.. As stated above, even with everything working properly 134a isn't going to cut it in FL.
Checking the monovalve is Always a good idea! Just had a 560 in where the MV was leaking hot water into the heater core..replaced that and the AC got Quite a bit cooler..imagine that..!
You may take a look @ HC12 for a drop in replacement..hydrocarbon yes, but more efficient then even R12.
Jonathan
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