Ever heard 'if it don't fit, get a bigger hammer'? Took the black box to a local repair shop this morning (Norcold will not sell to an individual!) to order a new part. Talked to the owner about the part> he asked if the light had come on and stayed on - yes. I told him about the attempt with a magnet to get a re-set. He took it and looked. There was a coach with a outside cover off the refrigerator. He walked over and took the black box off it and put mine in it's place. Red light comes on. He got a parts magnet and held in place for several seconds. Nothing. "Let me get a bigger one" Walked over and got another part magnet with a may 3 inch head on it. Held it against the top edge of the box above the red light. Maybe thirty seconds later and the light went out. He swapped out the boxes and said 'here ya go'. No charge! What a nice kid this guy is, and is the OWNER of the business. I didn't realize it at the time, but I knew his grandfather years ago.
Best encounter I have had lately.