Assuming you are talking about a Suburban brand water heater...A lot of times when you burn up the electric element, you also can burn up the fusible link on the hi-limit ECO/thermostat.
This is the part underneath the rubber covers that say reset. You have TWO of these, and the one on the left is to the electric heating element...while the one on the right is to the propane side
Here is a pic of the link being burned out, on the left..as you can see it visually as it goes from the top terminal to the bottom terminal. You'll have to replace it, if it's blown........ but you can also just push the reset button to see if the ECO has possibly tripped.
If you do have to replace, make sure you get the correct one to the 120 volt AC heating element.
This schematic shows how the single 120 volt AC hot wire is connected via the switch, thru the ECO/thermostat, then to the electric heating element.