John Wood Direct Vent - Manuel (Page 43)

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LED STATUS PROBLEM CORRECTIVE ACTION
4 FLASHES The Gas Control Valve’s
temperature sensor has
detected that the water
temperature was too high.
Once this condition occurs,
the Main Burner and the Pilot
Light will be shut off. Since the
Pilot light will be off, should
this condition occur, this Flash
Code will only be displayed
immediately after the Pilot has
been relit. Turn Gas Control
Valve/Thermostat knob to
“OFF”. Relight pilot and verify 4 flashes. If 4 flashes are
observed, turn Gas Control Valve/Thermostat
knob to “OFF”. Turn Main Gas Supply “OFF.”
Replace the Gas Control Valve/Thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
5 FLASHES The temperature sensor
(thermistor) is defective. Turn Gas Control Valve/Thermostat knob
to “OFF”. Replace the temperature sensor
(thermistor).
7 FLASHES Gas Control Valve failure. Turn Gas Control Valve/Thermostat knob to
“OFF”. Turn Main Gas Supply “OFF”. Replace
the Gas Control Valve/Thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
8 FLASHES This condition only appears if
the gas control/temperature
knob has been turned off
and the thermopile continued
to produce electric power.
This condition can occur if
the thermopile does not cool
down as quickly as expected
when the unit is shut off. This
condition can also occur if
the gas control/temperature
knob has been turned off and
the pilot continues to operate
because the pilot valve is
stuck in the open position. Make sure that the gas control valve/thermostat
knob is set to “OFF”. Wait one minute. Remove
the outer door. Look through the sight glass for
a pilot flame. If a pilot flame is observed with
the gas control valve/thermostat knob set to the
“OFF” position, the pilot valve is stuck open. Turn
the main gas supply “OFF”. Replace the gas
control valve/thermostat. For instructions, see
“Removing and Replacing the Gas Control Valve/
Thermostat.”
If the pilot flame is not observed when the gas
control valve/thermostat knob is set to the “OFF”
position, wait 10 minutes for the thermopile to
cool, then attempt to relight the pilot by following
the lighting instructions on the water heater’s
label. If this condition returns, replace the gas
control valve/thermostat. See “Removing And
Replacing The Gas Control Valve/Thermostat” for
instructions.