Bad Element on Electric Heaters

Electric water heaters typically have two heating elements, one upper and one lower. If one burns out or otherwise fails to work properly, you'll still get some hot water, but the hot water temperature might be lower than normal (indicating the upper element is bad) or the quantity of hot water might be reduced (indicating the lower element is bad). In some cases, the thermostat controlling each element is the cause of failure and should be reset or replaced.