RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
Residential Electric – continued
Complaint: | Lack of Hot Water | |
Test Conditions: |
|
|
Upper thermostat satisfied |
| |
Test between upper high limit 4 and upper thermostat 4 | ||
If … |
| … then |
proper voltage is not present | replace upper thermostat. | |
proper voltage is present |
| continue to next step. |
Test between lower high limit terminal 1 and 3 or L1 and L3 | ||
If … |
| … then |
proper voltage is not present | • check wiring to upper thermostat and | |
|
| heater junction box. |
|
| • check that off peak meter is not |
|
| “Open”. |
proper voltage is present |
| continue to next step. |
Test between lower high limit 2 and 4 or L1 and L4
If … | … then |
proper voltage is not present | push lower high limit reset. |
pushing reset restored voltage | • conduct lower thermostat check |
| • conduct lower element checks |
pushing reset did not restore voltage | replace lower high limit |
proper voltage is present | continue to next step |
A.O. Smith Water Products Company | 42 | Training Department | |
©2002 | Ashland City, Tennessee | ||
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