3977393 Dryer Thermal Fuse for Whirlpool Maytag Roper Kenmore KitchenAid Dryers - Replaces 279816VP 3399848 - 4 Pack

3977393 Dryer Thermal Fuse for Whirlpool Maytag Roper Kenmore KitchenAid Dryers - Replaces 279816VP 3399848 - 4 Pack3977393 WP3977393 Dryer Thermal Fuse Key Features High Temperature Safety Cut Off: Engineered as a critical non resettable safety device that monitors the temperature of the heating element housing. It is designed to trip and break the electrical circuit if temperatures reach approximately 309F. Precision Calibrated Solder Link: Features a high sensitivity internal thermal link that reacts instantly to localized overheating, providing a vital

3977393 / WP3977393 Dryer Thermal Fuse

Key Features

• High-Temperature Safety Cut-Off: Engineered as a critical non-resettable safety device that monitors the temperature of the heating element housing. It is designed to trip and break the electrical circuit if temperatures reach approximately 309°F.
• Precision-Calibrated Solder Link: Features a high-sensitivity internal thermal link that reacts instantly to localized overheating, providing a vital secondary defense against dryer fires caused by heating element shorts or severe airflow restrictions.
• Reinforced Terminal Interface: Equipped with two 1/4-inch male spade terminals designed for high-amperage stability, ensuring a secure electrical connection that resists pitting and carbon buildup over time.
• Durable Ceramic/Polymer Housing: Encased in a heat-stabilized, high-impact housing designed to maintain structural integrity while mounted directly to the high-heat environment of the metal heater box.

Replaces / Cross-Reference Part Numbers

• WP3977393
• AP3094244
• PS334299
• 3399848
• 279816VP
• 3389946
• 3398671
• 695563
• AH334299
• EAP334299

Compatibility & Fitment

This high-limit fuse is a standard safety component for most Whirlpool-manufactured dryers (Electric and Gas) produced over the last 30 years. Key compatible brands include:

• Whirlpool & Maytag: Fits hundreds of LER, LGR, MED, and MGD series models (e.g., LER4634EQ2, MEDC215EW1).
• Kenmore (110 Series): Compatible with virtually all 110-prefix models produced by Whirlpool for Sears (e.g., 110.60852990).
• KitchenAid, Roper, & Estate: Direct fit for dozens of budget-friendly and high-end top-lint-filter dryers.
• Amana & Crosley: Compatible with NED, NGD, and CDE series units utilizing the 3977393 style fuse.
• Note: Unlike the blower-housing fuse, the 3977393 is typically located on the side of the metal heating element housing.

When to Replace

• No Heat (Electric Dryers): The dryer drum turns and the air blows, but it never gets warm. This is the most common symptom of a blown 3977393 fuse on the heater box.
• Dryer Won't Start (Certain Models): In some Whirlpool-built designs, a blown high-limit fuse is wired in series with the motor, preventing the unit from starting entirely.
• "Check Vent" Light Stays On: If your dryer senses extreme back-pressure and heat, it may blow this fuse before you have a chance to clean the duct.
• Dryer Shuts Off Mid-Cycle: The unit stops unexpectedly as the heater housing reaches unsafe temperatures, cutting power to the system.
• Continuity Test Failure: Use a multimeter to test for continuity. If the fuse shows "Open" (no beep), the internal link has melted and the part must be replaced.

Installation Tips

• Safety First: You MUST unplug the dryer. Since this fuse is part of the high-voltage heater circuit, attempting this repair while the unit is plugged in is extremely dangerous.
• Access the Heater Box: On most models, you must remove the rear panel of the dryer. Locate the metal cylinder or box that houses the heating element; the 3977393 fuse is mounted to the side of it.
• Inspect the Thermostat: This fuse is often paired with the **3387134 High-Limit Thermostat**. If the fuse is blown, it is highly recommended to inspect or replace the thermostat at the same time.
• Clean Your Vents (CRITICAL): A thermal fuse blows for a reason—usually a clogged dryer vent. Before installing the new fuse, use a vacuum to clean out the internal blower housing and the exhaust ducting all the way to the outside wall.
• Tighten the Connections: Ensure the wire terminals are tight when you push them onto the new fuse. Loose connections create heat, which can lead to premature fuse failure or melted wires.