I was a bit worried that I'd wrecked my most recent 5 gallon batch of white wine. The 5gal fermenting vessel, sits on a heated panel, powered via a temperature sensor, display and control. Towards the end of the fermentation, the sensor fell of the vessel, so the panel stayed on full time, over-heating the wine. In fact it has turned out to be good as ever, I opened the first bottle of the batch, yesterday..