Pulled into camp with generator running house air. Shut generator and set up coach for camp. plugged in electrical cord (50 Amp) and no power to coach. Had a repair guy come out and he assumed the switch is bad and bypassed it so i could have power. It was 100 degrees outside. Question is how do I try to reset this switch. I have him coming back out to put it back together. At the time we assumed it was bad I did not realize it shows a code. Not sure what the code is but will get when he puts back together

The TS on our 2014 Bounder 35k was intermittent earlier this year.  If we gave it a hard thump, it would come back on, but wouldn't stay on for long.  We were leaving on a trip to Disney with our grandchildren in two days, so had to get an emergency replacement.  Just like the OP, to the tune of almost $800.