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Page 24
Gas Control & Thermal Well Removal From Water Heater
Note: The Component Disassembly, Gas Control Removal, and Gas Control Assembly
sections replace pages 24-30 in the Defender Atmospheric service manual, p/n
238-44943-00.
Step 1. Move the gas control power switch to the “OFF”
position.
Step 2. Unplug the water heater and Accessory Module from the
wall outlet.
Step 3. Drain the water heater to a point below the gas control
level.
Step 4. Turn off the gas supply to the water heater and disconnect
the gas piping from the gas control.
Step 4. Disconnect the pilot tube
using a 7/16” wrench and the main burner
feedline with a 3/4” wrench from the gas
control.
Step 5. Disconnect the wire harnesses and spark igniter/
flame sense wire from the gas control.
Step 6. Remove the gas control & thermal well by rotating
the flats of the Thermal Well counter clockwise using a 1-5/16”
wrench.
Component Disassembly
Gas control power
switch
Pilot and main
feedlines
Spark igniter/flame
sensor wire
Gas control
Flats of thermal
well
Water heater power cord and
Accessory Module transformer
24