A.O. Smith PROLINE ELECTRIC 730098, Maintenance & Troubleshooting Manual

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Turn power off. Disconnect power wires from lower
element. Set meter to lowest resistance setting.
Check resistance between the two screw terminals
on upper element.
Resistance will be between 5 and 25 Ohms if
element is good (12.5 Ohms typical). If resistance is
outside this range, replace element. If lower element
is good, replace lower thermostat.
THERMOSTATIC MIXING
VALVE
CHECK LOWER HEATING
ELEMENT
3 2
Higher tank temperatures will increase hot water
delivery but also increase the risk of scalding. If
temperature is set above 120F, install a thermostatic
mixing valve.
TROUBLESHOO
TING & MAINTENANCE