Whirlpool 721.663398 manual Checkout Procedures for Relay, Problem a, YES Good, Problem B, Yes

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(2) CHECKOUT PROCEDURES FOR RELAY

- PROBLEM (A) -

FAN motor and oven lamp turn on without touching START key when the door is closed.

YES

GOOD

Remove the mate connector of I/O CON from the circuit board does the unit still operate?

Replace the circuit board

- PROBLEM (B) -

FAN motor and oven lamp turn on When the door is closed and START key is touched.


		YES			NO

GOOD

Check the interlock switches


		NO			YES

Replace the micro switches.

Defective RELAY or poor connection of relay

Replace

RELAY or correct the connection.

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Contents Division Basic Field Manual For Microwave Oven Page Foreword Adjustment Procedures Check the Door Latch and Switch ClosingAdjust the Latch and Switch Closing Test the Latch and Switch SequenceLatch Latch Board Precautions on Installation Features and SpecificationsGeneral Precautions in USE Trial OperationSpecifications Switch TableSchematic Diagram Overall Circuit Diagram Matrix Circuit for Touch KEY Board Operating Procedures A. Oven Control Panel Easy USE Table Procedure for Measuring Microwave Energy Leakage Measuring Microwave Energy LeakageMeasurement with the Outer Case Removed EquipmentPower Output Measurement Measurement with a Fully Assembled OvenRecord Keeping and Notification After Measurement Disassembly Instructions Important NotesDoor Assembly / Removal Magnetron Removal FAN Motor Assembly / Removal High Voltage Transformer Removal Removing SensorHigh Voltage Capacitor and Diode Removal Interlock System Interlock MechanismPrimary Interlock Switch Test Secondary Interlock Switch TestMonitor Switch Test Components Test Procedure ResultsTest and Checkout PROCEDURES, and Troubleshooting Test Procedures ComponentsFilament Winding Primary Terminal MagnetronHigh Voltage CapacitorDiode Power RelayLevel FAN MotorCheckout Procedures Checkout Procedures for Fuse BlowingProblems Causes Checkout Procedures for Relay Problem aProblem B YES GoodPage Trouble Shooting Condition Cause RemedyCondition CheckResult Fuse blows Condition Check Result Cause RemedyCondition Check Result Cause Remedy Check Result Exploded View Door Parts Controller Parts Oven Cavity Parts Latch Board Parts Interior Parts Base Plate Parts Sensor Parts No MFL30502909

721.663398 specifications

The Whirlpool 721.663398 is a versatile refrigerator designed to meet the demands of modern households while providing exceptional performance and energy efficiency. With its sleek design and innovative features, this model stands out in the realm of home appliances, offering both style and functionality.

One of the standout features of the Whirlpool 721.663398 is its spacious interior, which provides ample room for storing groceries and other food items. The refrigerator is designed with adjustable shelves that can be easily configured to accommodate various types of food and beverages, making it a practical choice for families of all sizes. Additionally, the inclusion of door bins adds to the organization, allowing for easy access to smaller items like condiments and snacks.

The refrigerator utilizes advanced cooling technology to maintain optimal temperature levels, ensuring that food remains fresh for longer periods. The adaptive cooling system responds dynamically to fluctuations in temperature, providing consistent cooling performance. This technology not only preserves food quality but also enhances energy efficiency, helping homeowners save on utility bills.

Another impressive characteristic of the Whirlpool 721.663398 is its energy-efficient design. This model is ENERGY STAR certified, meaning it meets strict energy efficiency guidelines set by the U.S. Environmental Protection Agency. Homeowners can enjoy peace of mind knowing that they are reducing their environmental footprint while benefiting from lower energy costs.

In terms of convenience, the Whirlpool 721.663398 features a modern ice maker that provides on-demand ice production, perfect for hosting gatherings or simply keeping drinks cool during hot summer days. The exterior water dispenser offers easy access to clean and filtered water, promoting hydration without the need for bottled alternatives.

The refrigerator is also designed with a user-friendly digital control panel that allows for easy temperature adjustments and settings. This intuitive interface makes managing the appliance straightforward, even for those who might not be tech-savvy.

Overall, the Whirlpool 721.663398 combines style, functionality, and energy efficiency into one cohesive appliance. Its spacious interior, advanced cooling technology, and convenient features make it an excellent choice for those seeking a reliable refrigerator that caters to the needs of modern living. Whether you're stocking up for a large family or hosting social gatherings, this refrigerator is well-equipped to handle it all.