No, not last and final.
I went camping in Arkansas for 8 days. Weather was hot 95*-100* and very humid. I started on electricity for the refrigerator and it cooled nicely, but then it seemed to be ineffective, like 50* in the fridge section, and it just wouldn't get colder. So, I thought, what the heck, I'll switch to LPG and see how it goes. IT WORKED GREAT! The lettuce freezes just like it used to do. And I could see that the thermistor was working because on GAS, the temp control worked as it should.
So, my conclusion from this camping trip combined with the prior testing that I did (thank you Old Biscuit) is that the board just does not regulate the 110V function properly and I will order and install a new board. I checked with Dinosaur boards but the do not have a replacement to fit my trailer so I will go with a new factory unit.
