SBN71-120 thru SBN85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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 | |
If… |
| then |
continuity check pin to pin of lower | See Test 4 | |
temperature probe shows 1 or 0 (E4) | Check wiring and plug connections to heater | |
|
| control board receptacle E4 |
|
| Replace lower temperature probe |
continuity check red wire pin to red wire pin | see Test 4 | |
on upper temperature sensor shows 1 or 0 (E3) | Check wiring and plug connections to heater | |
|
| control board receptacle |
|
| Replace upper temperature probe |
All above checks are okay | Replace the water heater control. | |
|
|
|
State Water Heaters | 44 | Technical Training Department |
Ashland City, Tennessee © 2007 |
|
|
