GAS CONTROL REPLACEMENT
Step 1. Rotate knob of the gas control
to the “OFF” position.
Step 2. Turn off gas supply to water heater.
Step 3. Disconnect gas supply line from
gas control.
Step 4. Turn off water supply and drain water heater completely.
Step 5. Remove outer jacket burner access door.
Step 6. Slide open inner combustion chamber door.
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For White Rodgers gas
control, depress knob
slightly and rotate
clockwise to the “OFF”
position.
For Robertshaw gas
control, rotate knob
clockwise to the “OFF”
position.
Step 1. Disconnect thermocouple from gas control.
Step 2. Using a multimete r capable of measuring Ohms (or c ontinuity),
attach one lead (alligator clip) to the pilot tube. Inse rt the other lead
(probe) fully into the magnet openin g, Be sure the probe makes
contact only at the top center of the magnet opening. Do not allow
the probe to make contact with th e threaded sides of the openin g.
Step 3. If continuity is indicated, the ECO is OK. If continuity is not indicated, the ECO has opened and the
gas control must be replaced.
ECO (Energy Cut Off) TESTING
SERVICE PROCEDURE AG-III
Gas Control Testing and Replacement
For Models using White Rodgers or
Robertshaw Gas Control
Figure 23
Figure 24
Figure 25
Figure 26
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