Can't speek for your Alfa but in our coach where the control panel is located (tank levels, batt. cond. etc) there is a switch to turn the ignitor on the gas side to "OFF". Then there is a seperate switch with a pilot light that controls the electric side of the water heater which has to be turned to the "ON" position. Now our water heater also has a switch outside right at the water heater so you might want to check yours to see if you have one as well. On ours it's a rocker switch located toward the bottom of the water heater which I leave "ON" all the time. Hope this might help.
Steve & Sally / HiTee & Hudson Our Little Poms / Heidi & Houston Forever in our Hearts
04 NEWMAR MACA 3778 W22 / 05 PT Vert
Michigan (Summer) Florida (Winter)