Step 1. Rotate the knob of the gas control to the “OFF” position.
Step 2. Turn off gas supply to the water heater.
Step 3. Disconnect the gas supply line from the gas control.
Step 4. Disconnect the piezo igniter wire.
Step 5. Remove the gas control cover screw using flat-head screwdriver.
Step 6. Depress both tabs on the top of the gas control cover and pull straight out to remove.
Step 7. Disconnect the temperature sensor from the control board and remove the wire from the temperature sensor wire routing clip.
Step 8. Remove the piezo igniter from the control cover by releasing the lock tab on the control cover.