Turned Frymaster fryer on to 350. Burners came on. Heated to 350. Cycling at 350. Let drop in temp. cycled back on at 344. Let cycle a few times. Made adjustment to t-stat. Brought cycle on temp up. Knob has no numbers on it. Marked with a screwdriver until new knob arrives. Temp degrees go to 400F. Chef said have knob shipped to this location.