There are too many questions on this guestion to address each one. If you post your question as a new question you’ll have an answer for your individual problem. Here are some fix’s for several situations.
An actual Whirlpool certified repairman came out to check our icemaker. It turned out there was an air gap at the top that let in room air which allowed water to condense on the outside of the water supply line and run into the icemaker and freeze. Making a big lump of ice and stopping the ice dispenser auger.
