A.O. Smith TC-049R3 Service Handbook page 51

RESIDENTIAL GAS AND ELECTRIC WATER HEATER
Residential Electric – continued
A-7 service – Voltage Checks "Lack of Hot Water" – continued
Test Condition
Lower tank water is at least 15°F below lower thermostat setting
Test between lower high limit 4 and lower thermostat 2 or lower high limit L4 and
lower thermostat T2
If ...
proper voltage is not present:
proper voltage is present:
Test between the terminals of the lower element
If ...
proper voltage is not present:
proper voltage is present:
A.O. Smith Water Products Company
©2005
SERVICE HANDBOOK
... then
check jumper between lower high limit
•
2 and lower thermostat 1.
replace lower thermostat.
•
continue to next step.
... then
check wire connections to lower controls.
conduct grounded element checks.
50
Technical Training Department
Ashland City, TN