Norcold N811 fridge-no power

OK how do I check that switch? I see something with wires running to it inserted in the flue, so I assume that's it. Do I just short it out?

I got 12V at the circuit board BTW. And when I was cleaning up the compartment I found a circuit diagram on the bottom of the compartment. Unreadable since it is under all sorts of flue piping.

OK by flashlight, I pulled the wires from that round device in the bottom side of the flue. I fridge did not respond to the off/on switch with the wires disconnected or with them shorted out. I see from the drawing all the way at top that there is another device above that switch. A thermister? Do I need to check that and how?

If these are not the problem what is left? The circuit board has 12V and the two fuses check out with an ohmmeter. Amazon has a replacement board, should I order one or call the mobile RV guy. I tried the guy we used last time, he is not taking work until after Christmas. But there are a couple of others in the area.

The replacement board is $128 and the rv guys are $100/hr including travel time so the cost is about the same.

OK just an update.

OK the only thing left seems to be the eyebrow panel on the front of the fridge. A trip to YouTube showed me how to get to it. I opened it up and it was quite dirty. I gave it a clean up with contact cleaner. Still does not work tho.

Thinking back on this, I have not been able to set the temp on the fridge, I could cycle thru only some of the temp settings but no matter where I set it, it would revert to setting: 5. Maybe that was an early sign of trouble.

So I suspect either that board or the membrane switches which I don't see a way to get to so far. There is only a ribbon cable and I don't see any obvious test points.

Any suggestions?

Another thing to try is the other end of that eyebrow ribbon where it attaches to the control board. When mine would not work on electric I removed that harness connector and cleaned the contacts with a pencil eraser and reconnected the harness and all was well again. If that does not help I would remove the control board and look at the back side and see if you see any burned tracks in the solder tracks if so it might be the control board.

How are you making out with your refer problem?