I tried to edit my post to you, but you had already replied.
After I typed the question, my boyfriend showed me the freezer--before I was typing what he said.
There is evidence of ice melting and re-freezing on the interior walls and on the storage racks. There were large frozen chunks of ice on some of the food in the freezer directly under the ice maker.
There are two lights on the back wall which light up the freezer and there is a plastic cover that covers the light bulbs. There was ice built up inside that cover (right side).
The ice is frozen in streams running down the back right corner of the freezer (looking at it, it's on the right.) Also there were large frozen chunks of ice on some of the food in the freezer directly under the ice maker.
(I don't know why he didn't tell me any of this as I was asking the question in the first place--I'm sorry!!)
Wednesday the plastic water line to the freezer cracked and leaked under the kitchen sink. Today a plumber replaced the plastic line with a copper one.
After the water line was fixed, I reconnected and turned on the ice maker, which had not been working for a while--I thought it was because it and had not been positioned in the freezer properly. The ice maker began making ice again.
The auger does not turn to put the ice into the door so we have to pull out the ice storage bin in order to get ice.
By this time, the ice storage bin should have been full of ice, but it appears that it stopped making ice and started leaking water somehow.
Several times during the day yesterday my boyfriend had pulled out the ice bin to see if it was working. Maybe he didn't push it back in properly? Not sure about that and shouldn't the ice maker have turned off anyway if that were the case?
For the time being, we have turned the freezer to zero, turned off the water line to the freezer, and moved the food out until we can figure out what to do. The fridge side is still operating.
UPDATE: The freezer had thawed a bit so we turned on the freezer to see if it was still making that loud rattling noise. That sound has stopped and the re-circulation fan appears to be running normally--it sounds normal.
So, now it appears that the problem is perhaps the ice maker gone awry? Any suggestions?