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    Johnson A421 Controller, Hisense Chest Freezer, Thermocouple, and Frozen Carboys

    Frozen by XPLSV posted May 12, 2018 at 4:20 PMHaven't had this happen before, but I have two batches of lager that I found frozen this morning. I was using a Johnson A421 controller in conjunction with a chest freezer. I have used both before for a half dozen batches or so, without problems. I...