This replacement light switch has the correct ridge/notch to clear the grille on your Sub Zero refrigerator. Also Replaces:AP3193221, PS296126, 549702, 1118894, 66987-1 Model:WR23X10143 , 5309918806 , PS316042 and AP3132744 Designed for use in a refrigerator as a light switch, turning "on" when the door is opened Switch is normally on until the activator is depressed;