Before beginning repairs to your refrigerator, disconnect the refrigerator's power source. Because accessing the rear of the refrigerator isn't necessary, the easiest means of disconnecting the refrigerator's power supply is turning off the refrigerator breaker in your home's service panel. If you're able to access the refrigerator's power cord, unplug it from the wall outlet.
To access the ice door you must first remove the dispenser cover and assembly from the refrigerator housing. Remove the drip tray from the bottom of the dispenser housing by pulling it straight away from the housing. If screws are located on the front of the dispenser cover, remove them and slide up the cover. If no screws are present, look for the pry slot on the bottom of the front of the dispenser. Insert a screwdriver into the slot and pry the cover away from the front of the dispenser. Disconnect the wire connector from the rear of the cover and set the cover aside. Remove the screws securing the dispenser assembly to the dispenser housing and remove the assembly.
The dispenser solenoid physically moves the dispenser plunger, which opens and closes the ice chute door. If the solenoid is damaged or fails, remove it and install a new one. To replace the solenoid, remove the screw on the bottom and loosen the screw on top. Slide the solenoid up and pull it away from the dispenser housing. Insert the plunger into the top of the new solenoid, then hook the top of the solenoid onto the loosened screw. Reinstall the lower screw and tighten the top screw.
If the dispenser door itself is broken, you'll need to remove it and install a new one. To remove the door, remove the solenoid and the two screws securing the door in place. Transfer the plunger from the old door to the new one and secure the new door in place by replacing the screws. Reinstall the solenoid and reassemble the dispenser.