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SERVICE PROCEDURE RG-II
Thermocouple Testing and Replacement
Thermocouple Replacement
Step 1. Turn off gas supply to water heater. Rotate knob of combination
thermostat/gas valve to “OFF” position.
Step 2. Remove outer jacket door.
Step 3. Remove right side of inner door per SERVICE PROCEDURE RG-I,
steps 3a through 3c.
Step 4. Disconnect thermocouple from combination thermostat/gas valve (3/8" wrench). Locate other end of
thermocouple inside of combustion chamber and remove from pilot bracket. Pull firmly pulling away
from the pilot assembly.
Step 5. Install new thermocouple into pilot bracket making certain the
thermocouple is fully engaged into the pilot bracket. Position
thermocouple against left side inner door flange at its original
position. Connect other end of thermocouple to combination
thermostat/gas valve (finger tight + 1/4 turn).
Step 6. Inspect inner door gasket per SERVICE PROCEDURE RG-I, Step 4.
Step 7. Install right side inner door per SERVICE PROCEDURE RG-I, Step 10 through Step 13.
Step 8. To resume operation follow the instructions located on the lighting instruction label or the lighting
instructions located in the installation and operation manual.
Position thermocouple,
in its original position
Make certain thermocouple is
fully engaged into bracket