The most common reason for replacing the door flap is if it does not open to release ice when the dispenser arm is depressed or does not close after the ice is released.
Whirlpool ice dispenser door flap.
How do you replace the ice door flap.
Once removed lift the dispenser cover off.
Answer jim to replace the ice door you will need to disconnect the power to the unit and then you will need to remove the screws that are located under the drip tray.
The water dispenser works fine.
One of the tabs on the side broke off.
Whatever mechanism that activates the ice to come out of out is extremely touchy.
Somehow the tab or mechanism is not making good contact somewhere for the ice.
This video provides step by step instructions for replacing the ice dispenser door flap on whirlpool refrigerators.