My ice maker will begin working after a day or two. (If it is on shore water and power). I think it is an issue with air in the line.
It will only put out one or two ice cubes a day
while dry camping!
Can be tough when you invite guests over for afternoon libations!
I havent' looked at it yet to try and diagnose the "problem", but the above (OPs) suggestions are where I would start.