SANIBEL 2014 Model 3601

[Forecaddiegolf]

My 40’ unit has two gray water tanks, one black water and one fresh water holding tanks. On the control panel inside, there are TWO rocker switches labeled “Tank Heaters” meaning below freezing they prevent tanks from freezing up. Question; two switches, four tanks. Which are “heated”?
TIA

[clr]

Only the waste tanks are heated by the 12v arrangement. I also have a 3601 Sanibel model year 2015. The waste tanks are located within the frame under the floor. One heater does the galley gray tank and the second does both the black and grey tank for the bath. The black are right next to each only and only 1 larger pad is used for both tanks. The fresh water tank is heated by the furnace.