The Whirlpool FC-63 Door Interlock Microswitch (part 81604B) is a critical safety component used in many Whirlpool, Maytag, and Amana microwave ovens. This switch ensures the microwave does not operate when the door is open, protecting users and maintaining operational safety. Key Features Microswitch for door interlock safety Prevents operation with door open Rated for 120/250V AC use Reliable snap-action mechanism OEM replacement for Whirlpool, Maytag, Amana, and other brands Specifications Part Number: FC-63 / 81604B Function: Door Interlock Safety Voltage Rating: 120/250V AC Current Rating: 16A Mounting Type: Snap-in Compatibility: Built-in and over-the-range microwaves Compatible Models Fits many models including: WMH2175XVQ3, WMH53520AS0, UMV1160CW2, AMV1150VAB3, MMV5208WB0, WMH32L19AS1, JMV9186WP0, MMV1174DE0, YWMH53520AS0, MMV1164WS0 Why Choose This Item If your microwave door no longer engages properly or the unit doesn't start, this switch is often the cause. Restore safety and function with this genuine OEM replacement part designed for long-lasting reliability.