Yup.....I had my switch go belly up. They're cheap little plastic switches and sometimes it happens. They're easy enough to pop out of the panel and measure to see if you've got voltage coming in and going out. You might want to turn off the breaker inside the coach as you test for 110V voltage, or it could be shocking.
I also had the hi limit go belly up, but the switch not being able to move would make it my first choice to troubleshoot.
Ken and Terry
2010 Georgetown 330TS being pushed by our
2017 GMC Terrain toad (4 wheels down)