RB215ABBP. I've installed plenty of copper wire heat probes but I don't think it would work in this case. Why not? Because, usually I can clear a frozen with my steamer in a few seconds. This took a few minutes of constant steam down the drain hole to clear. The blockage seems to be down where the drain tube passes by the freezer. That's at least a foot or more down the drain. There's got to be a service bulletin for this. If nobody's got a better idea, I'm going to try a braided heater in the drain.