PDX Series
PDX SERVICE PROCEDURE VI
Gas Control & Thermal Well Testing
and Replacement
Gas Control & Thermal Well Removal From Water Heater
Gas Control
Step 1. Position gas valve power switch to the “OFF” position and Unplug Heater from power supply.
Step 2. Drain heater to a point below the gas
control level.
Step 3. Turn off gas supply to water heater and disconnect gas piping from gas control.
Step 4. Disconnect wire harnesses and burner assembly from gas control.
Step 5. Remove gas control & thermal well by rotating flats of Thermal Well counter clockwise
Gas Control Removal From Thermal Well
Follow the steps below allows removal gas control from thermal well without removing thermal well from tank.
Step 1. Position gas control power switch to the “OFF” position and unplug water heater from power supply. Step 2. Turn off gas supply to water heater and disconnect gas piping from gas control.
Step 3. Disconnect wire harnesses & burner assembly from gas control.
Step 4. Using gas control service tool
View from back of control for clarity
Insert tool from
back of controlService tool shown inserted in to back
of control
Step 5. Pivot tool towards heater as far as possible (see photo below). Lift straight up on gas control. The control should move about 1/8". Hold control in position and remove tool. Lift straight up on control to remove completely from Thermal Well.
With service tool inserted, pivot tool back towards water heater as far as possible. Lift straight up on control, control will move 1/8". Remove tool and continue to lift straight up on control to remove from Thermal Well.
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