I have an electric water heater that suddenly stopped producing hot water. Checked the fuses and they were good. I checked the reset button on the upper thermostat and it hadn't popped out. Checked for voltage at the top two terminals on the upper t-stat and got 120v on each side when going from a ground. When I checked for voltage across those terminals I got nothing. It is my understanding that I should have 240v there. Then I started to investigate my fuse box. The water heater is fed through two 30a screw type fuses. With the fuse box switch on I get 120v on each side of each fuse when going from a ground. When I test across from one leg to the other I get nothing. Also I discovered if I cut the switch off I lose one of the 120v feeds when testing from ground. I'm baffled, and mama's not happy without hot water. Any help would be appreciated.