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Pilot Light Troubleshooting Flowchart - Whirlpool 12307 Installation Instructions And Use And Care Manual

Gas water heater with the flame lock safety system
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PILOT LIGHT TROUBLESHOOTING FLOWCHART

Does pilot light go out
when button is released?
YES
Has the thermal switch
tripped?
YES
Check for insufficient
combustion air.
Are there openings
for make-up air to
NO
enter the room?
YES
Are the openings of sufficient size?
See Combustion Air Supply and Ventilation
section in this manual for requirements.
YES
Is there a furnace/air
handler in the same room
NO
as the water heater?
YES
Does the return air duct for the furnace/air handler
draw its air from a separate location than the water
heater? See the Location Requirements section
and the Combustion Air Supply section.
YES
Is there proper drafting at the
drafthood? See Checking the
Draft section in this manual.
YES
Is the flame-trap free from
debris due to excessive lint,
dirt, dust or oil?
YES
Check the water heater for a Flammable Vapor (FV) event. Note: it may
be necessary to remove the manifold door assembly to visually inspect
the water heater. Reference the Maintenance of your Water Heater
section of this manual for removal instructions.
Is the igniter wire insulation burnt or
show signs of discoloration?
YES
26
Check Draft. (See Checking the
NO
Draft section of this manual.)
Are the wires from the gas
NO
control valve/thermostat firmly
connected to the switch?
YES
Are the wires damaged
and/or frayed?
YES
Replace the gas control
valve/thermostat.
Install correct size make-up air openings
per the Combustion Air Supply and
Ventilation section in this manual.
Correct size of openings
NO
to allow sufficient air.
NO
Check the vent system for restrictions/obstructions and check
the vent termination height. Refer to the Installation Instructions
NO
section of this manual for specific requirements.
Refer to the Use & Care Guide section of this manual for
NO
information on cleaning the flame-trap.
Is the pilot tube
NO
damaged?
YES
Shut-off the gas supply to the water
heater at the manual gas shut-off
valve, then contact Customer Service
at: 1-877-817-6750.
Secure connections
NO
and attempt a relight.
Is the thermocouple
NO
connection loose?
YES
Tighten the connection
Does the thermocouple pass the test?
YES
Contact a local Heating, Ventilation, Air-
Conditioning & Refrigeration authorized
service provider.
Does the flame-
trap show signs
NO
of discoloration
and/or debris?
YES
Test the thermocouple using the following
procedure: Disconnect the thermocouple
from the gas control valve/thermostat. Using
a multimeter with alligator clip leads, attach
the red lead to the body (copper part) of
the thermocouple. Attach the black lead to
the end (silver part) of the thermocouple
that connects to the gas control valve/
NO
thermostat. Follow the instruction to light
the pilot and watch the voltage readings on
the multimeter. After 45 seconds the meter
should read 12 millivolts DC or more.
Replace the thermocouple.
NO
U N I T R O L
WARNING
READ ALL INSTRUCTIONS
BEFORE
LIGHTING
T
N
S
Thermal
Switch

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