Jim,
Your electric water heater is mounted on a shelf directly above your Hurricane heater. You just need to remove the center stainless panel that the Hurricane control module is mounted to and the water heater will be easily accessed for service or replacement. If you have not maintained the sacrificial anode rod in the water heater tank, the aluminum water heater tank probably has a hole in it, and although the tank is replaceable, it is usually just as cheap to replace the entire water heater.
Gerald