3977394 Dryer Thermal Fuse for Whirlpool Kenmore Dryers

3977394 Dryer Thermal Fuse Replacement

Key Features

• Critical Safety Overheat Protection: Designed as a non-resettable safety device that permanently "blows" to break the electrical circuit if the dryer internal temperature exceeds a safe limit (typically 196°F).
• High-Conductivity Terminals: Features two 1/4-inch male spade terminals for a secure, low-resistance connection to the dryer's wiring harness, ensuring consistent power delivery.
• Durable Heat-Resistant Housing: The fuse body is constructed from high-grade, flame-retardant plastic designed to withstand the high-vibration environment of the blower housing.
• Quick Restoration: Provides an affordable and straightforward solution to restore dryer functionality without the need for expensive professional repairs.

Replaces / Cross-Reference Part Numbers

• AP3094224
• PS334278
• 279769VP
• 3389946
• 3398671
• 695563
• 80001
• 279548
• AH334278
• EAP334278

Compatibility & Fitment

This thermal fuse is one of the most widely used safety components in the appliance industry. It is compatible with most 29-inch wide dryers built by Whirlpool Corporation, including:

• Whirlpool & Kenmore: Fits a vast majority of 70, 80, 90, and 110-series residential dryers.
• Maytag: Compatible with Centennial and Bravos models produced after 2006.
• Additional Brands: Fits KitchenAid, Estate, Roper, Inglis, Crosley, Admiral, and Amana dryers.
• Note: This fuse is typically located on the blower wheel housing. If your dryer has two fuses on the heater box, this may be the one paired with the high-limit thermostat.

When to Replace

• Dryer Won't Start: On most electric dryers, a blown thermal fuse will prevent the motor from turning over entirely to prevent fire hazards.
• No Heat: On some gas dryers, the drum may still spin, but the igniter will not glow or release gas if the thermal fuse has failed.
• Testing for Failure: Use a multimeter to test for "continuity." If the meter does not beep or shows "OL" (Open Line) when touching both terminals, the fuse is blown and must be replaced.

Installation Tips

• Safety First (CRITICAL): Unplug the dryer from the wall outlet or turn off the circuit breaker before removing the back panel.
• Identify the Cause (PRO TIP): Thermal fuses rarely blow without a reason. Before installing the new fuse, check your dryer vent hose for clogs. A blocked vent is the #1 cause of overheating and blown fuses.
• Check the High-Limit Thermostat: Often, the high-limit thermostat (located near the fuse) fails at the same time. It is highly recommended to inspect or replace both as a pair to ensure a permanent repair.
• Vacuum the Blower: While the back panel is off, take a moment to vacuum out the lint buildup around the blower wheel and motor area to improve airflow and prevent the new fuse from blowing.