Water filled up ice receptacle and froze in a solid block.

Unplug fridge, close off water supply valve. Remove two screws attaching assembly to freezer wall, detach wiring harness. Remove parts from old assembly: wiring harness, shut-off rod, harness clamp and attach to new assembly. Connect wiring harness, two screws attach new assembly to freezer wall. Plug in fridge and open water supply valve (after an opportunity to change in-line filter). Works now!