Water Temperature Circuit Check - State Water Heaters SBN 71-120NE Service Handbook

SBN TANK TYPE COMMERCIAL GAS WATER HEATER
TEST 11 - WATER HEATER SHUTTING OFF BELOW SETTING
Conditions:
Main burner ignited
Stored water is below temperature setting more than 5° F (Tank Average).
Power off
Plug disconnected from heater control board receptacle E3 and E4
Black
TEST 11
If...
continuity check pin to pin of lower
temperature probe shows 1 or 0 (E4)
continuity check red wire pin to red wire pin
on upper temperature sensor shows 1 or 0
(E3)
all above checks are okay
©2003
SERVICE HANDBOOK
Red
Red
Water Temperature Circuit Check - Continuity
...then
see Test 4
check wiring and plug connections to heater
control board receptacle E4
replace lower temperature probe
see Test 4
check wiring and plug connections to heater
control board receptacle
replace upper temperature probe
replace the water heater control.
36
Technical Training Department
Ashland City, Tennessee