Hello,
I had the same problem with the shower box in my 23.8. I had to replace the Attwood float switch. The guys are correct about the internal condition of the shower box. Do yourself a favor and make it as easy as possible for removal and re-installation. I used male / female solderless connectors with some dielectric grease on the wires and quick disconnect hose connections. Now I disconnect the wires and hoses to the box, remove two screws with my cordless drill and take the whole thing into the garage for cleaning. In or out takes about 20 seconds!
Have a GREAT summer of boating!
