Unplug the power to your refrigerator.
Insert the tip of your flat-head screwdriver in the groove where the dispenser frame meets the fridge door and pop the frame out.
Remove the four screws on the corners of the dispenser control panel with your Phillips screwdriver.
Pull the control panel out and unplug the wiring from the ports at the rear of the board.
Remove the screws from the control panel housing with your Phillips screwdriver. Remove the housing. You will now have access to the lever.
Disengage the tabs at the top of the dispenser lever and remove the lever from the unit.
Fit a new lever in the old one's place and secure the lever tabs.
Replace the housing, screws, control panel and frame.