- Mar 3, 2021
- Reaction score
I have two brewing dial thermometers that I have equally calibrated with ice water. When I reach mash temp they show different numbers ± 4°F . So I try to keep one thermometer at 148 and one at 152. So at ~150, I stir, turn off the flame, and put the lid on. 20 minutes later I stir it and measure it again, and it's almost 160 °F. Then my beers end up with a high FG and a residual sweetness.