Service Manual

8
White Rodgers Electronic Gas Control Troubleshooting Chart
Flammable Vapor Ignition Resistant Water Heaters
Observe green LED indicator on gas control. Status
flash codes are displayed with a three second pause
before repeating. Check and repair the system as
noted in the troubleshooting table below.
LED Status
Control Status
Probable Cause
None (LED not on
or flashing)
Indicates control is off. Main
and pilot burner are off.
Gas valve is functioning normally. Gas valve is
not powered. Light pilot.
One flash every
four seconds
Not an error. Indicates pilot is
lit and main burner is off.
Gas valve is powered and waiting for the set
point knob to be turned to a water temperature
setting. If the set point knob is at desired setting,
the thermostat is satisfied.
One flash every
second
Not an error. Indicates main
valve is open and main
burner is lit.
Thermostat is calling for heat. Water heater
operating normally and is in heat cycle.
Solid ON
Not an error. Indicates that
the control is in shutdown
mode.
Set point knob was recently turned to “OFF”
position. Wait until LED goes out before
attempting to relight.
Two flashes and
three second
pause
Low thermopile voltage; main
burner not lit.
Loose thermopile connections or weak pilot
flame.
Four flashes and
three second
pause
Temperature cut-out limit
reached causing shutdown.
Excessive temperatures may have been
reached. Shut off the control and reduce the
water temperature. Thoroughly verify control
operation, replace if exceeding setpoint.
Five flashes and
three second
pause
Electronics, sensor, or gas
valve fault detected.
Control may be wet or damaged. Verify all
connections are tight; if problem persists replace
the control.
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