RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
Residential Electric – continued
Test between Thermostat 2 and High Limit 4 or T2 and L4
If … | … then |
supply voltage is present: | continue. |
supply voltage is not present | • check jumper between high limit 2 and |
| thermostat 1. |
| • replace thermostat – (tank must be 15°F |
| cooler than setting to activate thermostat. |
Complaint: Lack of Hot Water |
|
Conditions: |
|
Upper thermostat satisfied |
|
Lower portion of tank still calling for heat |
|
Test between high limit 4 and thermostat 4 and L4 and T4
If … | … then |
correct supply voltage is present | continue. |
correct supply voltage is not present | • check that tank water temp has satisfied |
| the upper thermostat. |
| • replace the upper thermostat. |
Test between high limit 4 and lower thermostat 1 or L4 and 1 | |
If … | … then |
correct supply voltage is present | continue. |
correct supply voltage is not present | check wiring connections. |
Test between high limit 4 and lower thermostat 2 or L4 and 2 | |
If … | … then |
correct supply voltage is present | continue. |
correct supply voltage is not present | replace lower thermostat. |
A.O. Smith Water Products Company | 37 | Training Department | |
©2002 | Ashland City, Tennessee | ||
|
