Found the source problem ! Attached a pic in the word .doc. The crimp on the spade lug for the wire going into the rear connector on the thermal switch had come loose.Geeez ! And yes, probably wouldn't have happened with OEM part ! Lesson learned.
Now, about the remedy for the cabinet to frame issue ?
Thanks again for all your help. No way I would have gotten this far this fast without the "check the continuity" advice !