Happened to me.. Before you start throwing money around there is something you can try.. Worked for me, 2 times so far (different switches) I won't tell you how many times it's failed but.. Hey, the cost is zero so let's go for it. Step one is to remove all power from the switch, there are basically 3 ways to do this.
1: Remove switch from motor home (Pull the whole panel generally and disconnect the wires from it, this is how I did it)
2: Pull a fuse... if you know where it is and which one it is.
3: Disconnect ALL batteries (Just the negative terminals)
Now,, Operate the switch at least 2 dozen cycles, 4 or more is even better.. The switch has a self -cleaning feature and if the problem is a simple dirty switch contacts, this may be enough to clean them up.
Finally.. Restore power and try again. If it works. ... Well, let's see the standard labor charge is 125.00/hr now days, minimum one hour, and I'll split it with you since you did the actual work
Ok, don't worry bout the bill