[Superannuated Peregrinator]

Thanks for your reply. I chuckle when you say my coach is "newer." I've already run into two instances where Newell has told me parts are no longer available for my coach, and in one case their replacement requires a Newell factory tech to install and program (waste tank sensor). 

I was wrong. Four, not three of the other buttons light up when the compressor switch is toggled to the off state. I attached some pictures. When you see the buttons lit a bright red, the compressor switch is in the off state. When you see them green (normally off state for each button), the compressor is in the on state.