I have a Johnson Controller with the metal probe and dial (not digital), set up on my fermentation chamber/freezer. My problem is; the freezer will not stop running. It has been going for almost 24 hours now... I know the probe is responsive, because if I turn the dial up one degree the fridge cuts off. Eventually, once it has warmed up that one degree, the freezer will kick back on and run forever! I've played this game since 50 degrees, and now I'm in the mid 60's. The freezer will only turn off if I move the dial up in temperature, it has never cut itself off. Any advice would be greatly appreciated.