I have the grainfather all in one connect 220 v and 2 conical fermenter pro. And a glycol chiller. Fabulous equipment. I am having fun. One question, my all in one boils to strong at 212 but put it down 1 degree and boiling stops. It over flows and I spend time changing the temp. I have a jacket on it and took it off during boil. Is there a reason that the boil is so inconsistent? Shouldn't it still boil if I turn it down one degree?