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Operating the Temperature Control System
Figure 19B: Status Codes Status Light Codes
LOW
Normal Flashes:
• 0 Flashes Indicates Control Off/Pilot Out.
• 1 Flash Indicates Normal Operation.
• Continuous Light indicates the gas control
valve/thermostat is shutting down.
Diagnostic Flashes: If the water heater is not working, look
for the following diagnostic flashes after lighting the pilot.
2 Flashes Indicates thermopile voltage is low.
4 Flashes Indicates overheat failure.
5 Flashes Indicates water temperature sensor failure.
7 Flashes Indicates electronic control failure.
List of status codes are shown
at top of gas control valve/thermostat
Water Temperature Adjustment
The water temperature setting can be adjusted from 55°F
to 155°R Turn the Gas Control/Temperature Knob to the
desired setting/temperature.
NOTE: The temperatures indicated are approximates. The
actual temperature of the heated water may vary. Also,
some models are certified for 180°F outlet temperatures.
See the Data Plate on the front of the water heater for the
maximum outlet temperature.
8 Flashes
9 Flashes
10 Flashes
See "Status Light Code Troubleshooting
Chart."
Indicates chamber temperature sensor circuit
is open or shorted.
Indicates an LDO occurrence was detected in
the combustion chamber (contaminants).
Operating Modes and Settings
• Standard Mode - The controller adjusts the water
heater to maintain the temperature set by the user.
• Vacation Setting - The Vacation Setting (VAC) sets the
controller at approximately 55°F. This setting is
recommended when the water heater is not in use for a
long period of time. This effectively turns the controller
temperature setting down to a temperature that
prevents the water in the water heater from freezing
while still conserving energy.
2O
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