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Cooking Products Service Manual
Original July, 1996 4321891
© 1996 Whirlpool Corporation
As the ignitor heats up and its electrical resis-
tance decreases, current flow increases
through the bimetal arm heater inside the dual
gas safety valve. When the ignitor becomes
hot enough and its electrical resistance low
enough, sufficient current is provided (2.5 to
3.0 amps) through the bimetal arm heater, to
cause the arm to flex. This opens the gas
valve and allows gas to flow to the burner,
where the heat from the ignitor (approximately
2500˚F) ignites it, and produces a flame.
The ignitor will remain energized at all times
when the burner is lit. As soon as the oven
reaches its selected temperature, the EOC
relay opens, and power is removed from the
circuit. Once this occurs, the ignitor cools, and
the bimetal arm flexes and closes the gas
safety valve, turning off the gas to the burner
and extinguishing the flame.
LOW CURRENT
FROM IGNITOR
VALVE CLOSED
BIMETAL ARM
BIMETAL HEATER
GAS INLET
HIGH CURRENT
FROM IGNITOR
GAS VALVE
OPENS
HEAT FROM
BIMETAL HEATER
FLEXES ARM
GAS OUTLET
GAS INLET
GAS OUTLET
IGNITOR
BURNER
DUAL GAS
SAFETY VALVE
GAS FLOW