Why when I chop hot food does my machine get faster, unlike when I chop cold food?

To prevent splashing hot liquid, the speed on chopping is restricted.When you hold the chop button down the speed will gradually increase, once you take your finger off the button, thechop functionwillstay at thisspeed for 2 minutesunlessstopped.Whenyou are chopping without heat it will just stop when your finger is removed and works at one speed.