I would suspect that it is more likely a loose wiring connection. Of course, tracing it might be a real pain. I have not had good luck with RV dealers' shops being good at electrical things.
You can download a full electrical diagram of your coach from the Winnebago website, if you wish to try to tackle it yourself. And at $125/hr, I think I would at least give it a go.
My shop charged me $150 to tell me that my turn signal problem was a Freightliner issue. I fixed it in less than 15 minutes (including troubleshooting) by plugging in a loose connector!!
Norm & Janet
FMCA; WIT; FCOA; Good Sam; Passport