Gurgling Refrigerator - Update

Turns out it wasn't a gurgling refrigerator (Norcold 1210) after all. It was a struggling icemaker. After about a week of noisy gurgling/struggling, it delivered one load of yellow ice. Tossed that. Over the next couple of weeks, it gradually picked up speed and got less polluted-looking. Now it regularly turns out beautiful, sparkling clear ice as fast as we can use it up. Yay!

I still need to find the older recalls and be sure they have been handled.