Karma printed circuit liquid level board MPN 6317. 120 volt. The current replacement for this is # 9820. This board works on Karma model 352, 353, 454, 456. This is a liquid level control. It senses when the heater should come on and it also senses when to refill the water tank. This board is all you usually need when you have a one flavor machine with a push button on the front of the machine and not on the door. For more than one flavor, this board works along a second board in older machines.