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
3.0amps) 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.
Cooking Products Service Manual
Original July, 1996 | 4321891 |
© 1996 Whirlpool Corporation | Page |
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
GAS OUTLET
BIMETAL ARM
VALVE CLOSED 
BIMETAL HEATER
GAS INLET
HIGH CURRENT FROM IGNITOR
GAS OUTLET
GAS VALVE
OPENS
HEAT FROM 
BIMETAL HEATER
FLEXES ARM
GAS INLET
