RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
A.O. Smith Water Products Company
Training Department
©
2002
Ashland City, Tennessee
43
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 …
… then
proper voltage is not present:
•
check jumper between lower high limit
2 and lower thermostat 1.
•
replace lower thermostat.
proper voltage is present:
continue to next step.
Test between the terminals of the lower element
If …
… then
proper voltage is not present:
check wire connections to lower controls.
proper voltage is present:
conduct grounded element checks.
