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Step 7. Removal of combination thermostat/gas valve.
a) Disconnect main burner feedline
(3/4” wrench), pilot tube (7/16"
wrench) and thermocouple (3/8"
wrench) from combination
thermostat/gas valve & remove
from the combustion chamber.
b) Remove Piezo bracket with Piezo
igniter (refer to SERVICE
PROCEDURE RG-IV) from
combination thermostat/gas valve.
c) Remove combination thermostat/gas valve from heater, rotating counter clockwise using an
appropriately sized wrench. Use caution not to damage cast aluminum body of combination
thermostat/gas valve.
Step 8. Installation of combination thermostat/gas valve.
a) Install new combination thermostat/gas valve. Be certain not to damage the bundled wire leads.
Note: combination thermostat/gas valve must be installed in proper upright position to
assure the feedline will align properly at the inner door flange.
b) Reattach Piezo bracket with Piezo igniter to combination thermostat/gas valve.
c) Reattach main burner feedline, pilot tube and thermocouple to combination thermostat/gas valve.
d) Gather wire leads of combination thermostat/gas valve and Piezo igniter and secure along side of
feedline using new wire tie provided.
Step 9. Reinstallation of inner door assembly.
a) Prior to reinstallation of inner door, fully inspect inner door gasket for the following:
> Tears > Gasket Adhesion to inner door
> Missing material > Other imperfections that will inhibit proper seal
> Cracks > Material left on combustion chamber
> Dirt or debris
If the gasket is not affected by any of the above, gasket replacement will not be required.
If replacement is required, replace using new gasket kit following the instructions provided with kit.
SERVICE PROCEDURE RG-V
Combination Thermostat/Gas Valve
Testing and Replacement
Refer to
SERVICE PROCEDURE RG-IV
to remove Piezo igniter