THE ELEMENT MIGHT HAVE GONE, IS IT THE TYPE THAT WATER WILL NOT FLOW UNTILL IT HAS ELEC POWER, IF SO, AND WATER IS FLOWING, I WOULD SAY ELEMENT GONE.IF NO WATER FLOWS FROM UNIT IT CAN NOT BE GETTING ELEC FEED, SO MIGHT BE BURNT WIRE, INSIDE THE UNIT, IF YOU CAN GET A TESTER (SIMPLE ONES VERY CHEAP.)YOU CAN ELIMINATE THE WIRING AS PROBLEM. IF IN ANY DOUBT OF TOUCHING, CALL IN A EXPERT TO DO JOB.
KEITH
October 2008