Ultraheat Melted Black Water Tank!

The more I think about this, does anybody know where the switches are all located for our 2008 Cedar Creek. Buying it as a used unit maybe I'm missing something? Near the Kitchen sink we have the tank level indicators and in the same panel we have a switch for the water pump and the tank heater. Both light up red when switched to on. There is also a single stand alone red switch that is simply labeled tank heater that also lights up when turned to on. Near the entry door, we have a 4 switch panel that runs 3 exterior lights and the living room lights. We also have a single switch (not labeled) that apparently is a master switch for the slides as the rocker switch for the slides won't work without this flipped to on. We also have the rocker switch that actually moves the slides in/out. Of course we have the awning switch in this location also. Out side of this area, the bathroom only has two switches below the medicine cabinet, one for the lights and one that powers the fan. I'm just wondering if There's another switch or something that powers the tank heaters that I'm missing? I may have to call cedar creek today to see how they are suppose to operate. Maybe they are perfectly fine and I just don't know how to use my camper, lol.