Whirlpool Dryer Push-to-Start Switch WP3977456, Replaces 3977456

Genuine Whirlpool push-to-start switch that starts the dryer motor when the button is pressed and released. Used in selected dryers and washer-dryer laundry centers; failure may cause a no-start condition.

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✅ Cross Reference Information

Common Symptoms

• Start button does not respond.
• Start button feels stuck, loose, or mechanically damaged.
• Dryer starts intermittently when the button is pressed.
• Switch does not show continuity when the button is depressed, with power disconnected.

Check Before Replacing

• Unplug the dryer or switch off its circuit breaker before accessing or testing the switch.
• Confirm the start button moves freely and returns after being pressed.
• Inspect the switch body and terminals for visible damage, discoloration, or loose wire connectors.
• With the appliance disconnected from power and the wires removed from the switch as appropriate, check continuity across the switch terminals while pressing the button; continuity should be present when the switch is actuated.
• If the switch tests correctly, investigate other no-start causes such as the door switch, thermal fuse, motor, wiring, or timer/control according to the appliance’s model-specific service information.

Pro Tip

Part Details

Key Features

• Whirlpool genuine OEM start switch.
• Push-to-start, momentary-contact design.
• Snap-in switch construction documented for this part.
• Used in selected Whirlpool-built dryers and laundry centers.
• Supersedes previous Whirlpool part number 3977456.

Installation Notes

• Disconnect electrical power before servicing the dryer.
• Remove the start-button knob and access the control-panel area using the model-specific procedure.
• Label or photograph the wire locations before disconnecting them from the old switch.
• Release the switch’s locking tab or mounting feature without forcing the console or switch housing.
• Transfer the wires to the corresponding terminals, install the replacement switch, reinstall the knob and panel, and test the dryer before completing reassembly.

Verified Compatible Models

LTE5243DQ3, LTE5243DQ4, LTE5243DQ5, LTE5243DQ6, LTE5243DQ7, LTE5243DQ8, LTE5243DQ9, LTE5243DQA, LTE5243DT3, LTE5243DT4, LTE5243DT5, LTG5243DQ3, LTG5243DQ4, LTG5243DQ5, LTG5243DQ6

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.