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SBN71-120 thru SBN85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Ashland City, Tennessee 7002 ©
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
TEST 11
WATER TEMPERATURE CIRCUIT CHECK - CONTINUITY
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continuity check pin to pin of lower
temperature probe shows 1 or 0 (E4)
See Test 4
Check wiring and plug connections to heater
control board receptacle E4
Replace lower temperature probe
continuity check red wire pin to red wire pin
on upper temperature sensor shows 1 or 0 (E3)
see Test 4
Check wiring and plug connections to heater
control board receptacle
Replace upper temperature probe
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