So after installation of our UV water sanitation system I decided to tackle the ice maker. Got a new in line filter, opened up the back panel, checked the water flow, electrical all checked out OK, then took the ice maker out as per the service manual instructions, took it through the room temp test cycle, and everything worked. Put it back together, let it get back to freezing and no ice. My wife who thinks anything can be fixed with knocking it with her hand or other object then proceeds to take the handle of a knife and starts knocking on the thermostat. Eureka!!! the thing starts working!!!