Product review (3 stars): Leaking SM-50A Undercounter Ice Machine
I'm posting this here for other people who run into the same issue, since I haven't found anything online to help me repair my ice machine (and the folks at Manitowoc were completely useless, as they just referred me to a list of local repair companies that charge $250+ to just come out and diagnose the problem).

We have a Manitowoc SM-50A undercounter ice machine that started leaking and flooded an office adjacent to the kitchen where it is located. After hours of troubleshooting, I replaced the pump that removes excess water. I opened the pump, and it was clearly broken free of where it was attached inside the housing. That cost $250... I turn the ice machine on, and it still leaks.

I finally noticed that the leak was actually coming from the water filter. After replacing the filter, the machine still leaked. I was about to give up, and then I noticed that the internal portion of this filter head (where the filter cartridge slots into) is mis-shapen. I'm not sure how that happened, as the machine gave us several years of reliable service with no leaking... It looks as if the plastic actually melted, somehow, although the rest of the filter head looks fine. Due to the warped plastic, the filter wouldn't go in and make a snug connection (which resulted in the leak).

I just ordered this filter head, and I hope installing it finally solves the problem.