A.O. Smith TC-049R3 Service Handbook page 40

RESIDENTIAL GAS AND ELECTRIC WATER HEATER
Residential Electric – continued
C-2 – service continued
Complaint:
Conditions:
Procedure:
AC voltage check
Test voltage between 1 and 3 or L1 and L3 of high limit.
If ...
rated voltage is not present
rated voltage is present
Test voltage between 2 and 4 or L1 and L4 of high limit
If ...
rated voltage is not present
rated voltage is present
Test voltage between 4 and 2 or T2 and L4
If ...
rated voltage is not present
rated voltage is present
A.O. Smith Water Products Company
©2005
SERVICE HANDBOOK
No Hot Water
Tank water cold
Power on
Multimeter set for
Voltage Checks
... then
•
•
•
continue to next step.
... then
•
•
continue to next step.
... then
•
•
continue to next step.
39
check circuit breaker (fused disconnect)
check wire connections in heater junction
box
check position of heater ON/OFF switch-if
applicable.
press high limit reset button
replace high limit (after conducting
thermostat check)
check jumper between high limit 2 and
thermostat 1or
on T2, L4 test-replace control.
Technical Training Department
Ashland City, TN