Whirlpool 4322452 manual Testing the GAS Control Valves

Page 80

TESTING THE GAS CONTROL VALVES

The top burner gas valves control the gas flow to the top burners. The valve is a barrel and core, grease sealed, locking type valve (see Figure 6-12). Before the stem can be turned, it must be pushed in to unlock the valve. Gas flows from the manifold pipe into the rear of the valve and enters into the hollow core. The core has one large and two small holes in its side. When the stem of the valve is rotated, the core rotates with it. As the core is rotated, gas is allowed to flow from the large hole into the mixer elbow.

When the core is rotated 90-degrees, the large hole in the core matches the hole in the barrel allowing the maximum amount of gas to flow. When the core is rotated past 90˚, the gas flow is reduced.

Manifold Pipe

Valve Body

Barrel

Spring

Stem

To test a gas control valve:

1.Gas leak at the valve.

Push To Turn

Figure 6-12

a)Check to see if either the knob or the valve stem is rubbing the control panel. If so, align the manifold pipe before replacing the valve. If the alignment is good, replace the valve.

Note: Any type of side pressure on the valve stem will cause the valve to leak.

2.The valve stem is hard to turn, or cannot be turned.

a)Check to see if the control panel is preventing the stem from being pushed in. If so, adjust the manifold pipe. If not, replace the valve.

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Contents GAS Ranges Voltage Checks Table Of Contents Page Introduction Page Fundamental Properties of GAS Measuring Heat EnergyFuel Types #2 Mixed GAS#3 Manufactured GAS #4 Liquefied Petroleum L.P. GASCategory Characteristics of GAS Fuels FuelDistribution of Natural GAS 25 To 60 Pounds Pressure MainDistribution of L.P. GAS Pressure Regulators FunctionsRegulator Operation Open Position Regulator Diagnostics VentingMeasuring GAS Pressure WHIRLPOOL, U.S.A., Benton HARBOR, MIMagnehelic Gauge Cooktop Burner System GAS DistributionGAS Valve OFF PositionGAS Valve Orifices PLUG-TYPE OrificesOrifice Specifications Chart Natural GAS OrificesUniversal ORIFICE-OVEN Application Natural Gas PositionGAS Valve Orifice Diagnostics Performance Check Burner Operation AIR Shutter & Venturi Burner Head Flame Characteristics Properly Burning FlameNot Enough Primary Air Flame Quenching Page Improper Flame Diagnostics Symptom Cause Corrective ActionCleaning the Burners Port Burner Climber PortStanding Pilot Ignition System OperationRelighting a Standing Pilot Adjusting the Pilot Flame Height Cleaning the Pilot Electronic Ignition System 123Ground Strap Ignitor Spark Sealed Burner FlowElectronic Ignition Diagnostics Performance Check Oven Burner System Standing Pilot IgnitionGas 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 SELF-CLEANING System 88PBK P3-1 P3-4 Oven Off Bake Cycle Broil Cycle Bake BroilCode Guidelines F0 =Performance Check SELF-CLEAN Oven Door Locking System Door Locked Door Unlocked Natural and L.P. GAS Conversion GeneralConverting a Pressure Regulator Converting Cooktop BurnersConverting AN Oven Burner Converting AN Oven ThermostatBurner Flame Adjustment Performance Check Page Testing the Components General Information Testing AN Oven GLO-BAR Igniter Carborundum IgnitorTesting AN Ignitor Switch Offoff LiteliteTesting AN Oven Light Switch Testing AN Oven Temperature Sensor Testing AN Oven Door Latch To test the solenoid windings, perform the following stepsTo test the switches Testing a GAS Safety Valve Testing the GAS Control Valves Testing the GAS Pressure Regulator Manual Shutoff ValveTroubleshooting Chart Problem Possible Cause SolutionProblem Possible Cause Solution Schematic Diagrams Standard RangeSelf-Clean Range Strip Circuits BakeOven Light