KitchenAid KHMS105E service manual Convection Heating Element, Viewed from Under TOP Plate

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THE CONVECTION HEATING ELEMENT

The 1400-watt convection heating element is located under the circulation pulley cover and the top plate. The heating element heats the air that is distributed into the oven cavity by the convection fan. It operates on 120 VAC and is controlled by the convection thermistor,

and the heater relay on the microcomputer board. During a convection, or combination cooking cycle, the heater cycles on and off to maintain the programmed cavity temperature. The heating element surrounds the convec- tion fan blade and is not visible through the oven cavity.

UNCLIP

ELEMENT

HERE

HEATING ELEMENT

HEATING ELEMENT MOUNTING SCREWS

VIEWED FROM UNDER

TOP PLATE

BRACKETS

CIRCULATION

PULLEY COVER

CONVECTION

THERMISTOR

TOP PLATE

SENSOR

COVER

YELLOW

CONVECTION WIRES

HEATING

ELEMENT

TESTING

1.Set the ohmmeter to the R x 1 scale.

2.Measure across the heating ele- ment terminals.

You should measure between 40 Ω and 90 Ω @ 68˚F.

3-8

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Contents Microwave Oven Hood Combination KHMS105E KHMC107E Table of Contents Convection Thermistor Convection Heating Element Important Safety Information Electrical Shock HazardPage Vii Test Leakage TestEquipment Theory of Operation Relay #4 Capacitor Bkbl Blower Motor High Component Access Component SectionsGeneral Removing the Microwave Oven & CabinetBase Plate Screws Cooktop Light Assembly Wiring Protection Control System Removing the Oven DoorRemoving the Door Choke Removing the Control Panel Removing the Line Fuse REMOVING/ADJUSTING the Interlock Switches Removing a SwitchInset SecondaryMaking Adjustments Removing the Base Thermal Fuse Removing the Magnetron Thermal Fuse Removing the Cavity Thermal Fuse Removing the Convection Thermistor White Wires Operating Control System Removing the Oven Light SocketRemoving the Control Circuit Board Turn Board OverRemoving the Temperature Probe Socket Removing the FAN Motor Removing the Power Cord Removing the Blower Motor Capacitor Removing the Convection Heating Element Viewed from Under TOP Plate Removing the GAS Sensor Removing the Synchronous Motor Removing a Cooktop Light Socket High Voltage Components Accessing the High Voltage Components Removing the Magnetron Removing the High Voltage Rectifier High Voltage Capacitor Replacing The High Voltage RectifierHigh Voltage Rectifier Mounting Flange Removing the High Voltage Transformer Component Description & Testing Important Safety InstructionsPage Original 03/97 Thermal Fuses Possible Customer Complaint Blower Motor Capacitor GAS Sensor Convection Thermistor Convection Heating Element Viewed from Under TOP PlateMotors Programming Checks Touch Panel Continuity TestCombination Bake Temperature ProbeThings to Know Combination RoastCharts Problem Possible Cause Test Procedure Or CorrectionProblem Possible Cause Test Procedure Or Correction Problem Possible Cause Test Procedure Or Correction Checking the Microwave Power Output Checking for Microwave Energy Leakage Measuring The Oven With The Cabinet Installed Making the MeasurementsPage Component Testing Test ChartsTerminal-To-Terminal Contacts Component Test Procedure Result Keyboard Matrix Control Circuit Board Check List Voltage circuitsDoor Open PRIMARY, MONITOR, & Secondary Switch Checkout ProcedureContinuity Test Chart Door Closed

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