Whirlpool 4322452 manual Testing a GAS Safety Valve

Page 79

TESTING A GAS SAFETY VALVE

Some gas ranges use an electrically-controlled gas safety valve to control the flow of gas to the oven burner. The electric safety valve controls the gas flow by means of a bimetal-controlled diaphragm. Self-clean models have a single inlet, dual outlet, bimetal-operated safety valve. To prevent miswiring, the bake and broil terminals are sized differently. Several typical safety valves are shown in Figures 6-9 through 6-11. To test a gas safety valve:

1.Turn off the gas and electrical power to the range.

2.Set the ohmmeter to the R x 1 position.

3.Disconnect the wires from the bake and broil terminals.

4.Touch the meter leads to each set of terminals. The meter should indicate a low resistance reading of between 1Ω and 5Ω. If the meter indicates an open circuit, or a high resistance, replace the valve.

Orifice Hood

Heater Sensing

Bulb & Capillary Tube

Figure 6-9

Gas Inlet

Standing-Pilot Safety Valve

Terminals

Figure 6-10

Combination Bake/Broil

Gas Safety Valve

Broil Terminals

Figure 6-11	Bake Terminals
Figure 6-11
	Dual Gas Safety Valve

Page 6-9

Image 79

Contents GAS Ranges Voltage Checks Table Of Contents Page Introduction Page Measuring Heat Energy Fundamental Properties of GAS#4 Liquefied Petroleum L.P. GAS Fuel Types#2 Mixed GAS #3 Manufactured GASCategory Fuel Characteristics of GAS Fuels25 To 60 Pounds Pressure Main Distribution of Natural GASDistribution of L.P. GAS Functions Pressure RegulatorsRegulator Operation Open Position Venting Regulator DiagnosticsWHIRLPOOL, U.S.A., Benton HARBOR, MI Measuring GAS PressureMagnehelic Gauge GAS Distribution Cooktop Burner SystemOFF Position GAS ValvePLUG-TYPE Orifices GAS Valve OrificesNatural GAS Orifices Orifice Specifications ChartNatural Gas Position Universal ORIFICE-OVEN ApplicationGAS Valve Orifice Diagnostics Performance Check Burner Operation AIR Shutter & Venturi Burner Head Properly Burning Flame Flame CharacteristicsNot Enough Primary Air Flame Quenching Page Symptom Cause Corrective Action Improper Flame DiagnosticsPort Burner Climber Port Cleaning the BurnersOperation Standing Pilot Ignition SystemRelighting a Standing Pilot Adjusting the Pilot Flame Height Cleaning the Pilot 123 Electronic Ignition SystemGround Strap Ignitor Spark Flow Sealed BurnerElectronic Ignition Diagnostics Performance Check Standing Pilot Ignition Oven Burner SystemGas Standing Pilot Safety Valve Lighting the Oven Pilot GLO-BAR Ignition Thermostat Switch Contacts Oven Ignitor Safety Valve 50 to 1100 Ω Amps Safety Valve Thermostat Switch Contacts Oven Ignitor Safety Valve Cleaning the Oven Burner 88P SELF-CLEANING SystemBK P3-1 P3-4 Oven Off Bake Cycle Broil Cycle Broil BakeF0 = Code GuidelinesPerformance Check SELF-CLEAN Oven Door Locking System Door Locked Door Unlocked General Natural and L.P. GAS ConversionConverting Cooktop Burners Converting a Pressure RegulatorConverting AN Oven Thermostat Converting AN Oven BurnerBurner Flame Adjustment Performance Check Page Testing the Components General Information Carborundum Ignitor Testing AN Oven GLO-BAR IgniterOffoff Litelite Testing AN Ignitor SwitchTesting AN Oven Light Switch Testing AN Oven Temperature Sensor To test the solenoid windings, perform the following steps Testing AN Oven Door LatchTo test the switches Testing a GAS Safety Valve Testing the GAS Control Valves Manual Shutoff Valve Testing the GAS Pressure RegulatorProblem Possible Cause Solution Troubleshooting ChartProblem Possible Cause Solution Standard Range Schematic DiagramsSelf-Clean Range Bake Strip CircuitsOven Light