13 year old elect. hot water heater making a high pitched sound and very hot water.
What to do?
Turn your electric water heater's power off and disable the heater's circuit breaker. Turn the control valve to the pilot setting and close your heater's cold water supply inlet valve. Read more on http://www.ehow.com/how_12150341_hot-water-heater-making-highpitched-noise.html.