SBN 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
Red
Black Red
TEST 11
Water Temperature Circuit Check - Continuity
If… | ...then |
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continuity check pin to pin of lower | see Test 4 |
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temperature probe shows 1 or 0 (E4) | check wiring and plug connections to heater |
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| control board receptacle E4 |
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| replace lower temperature probe |
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continuity check red wire pin to red wire pin | see Test 4 |
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on upper temperature sensor shows 1 or 0 | check wiring and plug connections to heater |
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(E3) | control board receptacle |
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| replace upper temperature probe |
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all above checks are okay | replace the water heater control. |
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©2003 | 36 | Technical Training Department | |
Ashland City, Tennessee
