Drum washing machine small door switch disc window replacement part What this part does Replaces the small door switch disc window that interfaces with the drum door switch to restore correct door detection and switch actuation. Designed as a directfit replacement for the specified appliance models to reliable switch operation without replacing the entire door assembly. Key benefits Restores proper door sensing and cycle start function, reducing error codes related to door switch faults. Direct compatibility with listed models for a straightforward replacement that matches original form and fit. Compact and unobtrusive component that installs quickly, minimizing downtime for washing machine use. Built to match original component dimensions and materials so mechanical alignment and switch engagement remain correct. Compatibility Compatible with models: WD90N64FOAQ, WD90N64FOAW, WD90N64FOAX, WD90N64FOOW, WD90N64FOOX/SC Features and performance Function: small disc window that engages the door switch mechanism to signal door closed/open. Fit: designed to match the original part for correct positioning and consistent switch activation during drum cycles. Performance: restores reliable, repeatable switch engagement for normal washing machine operation. Installation notes Intended as a straightforward replacement part for technicians and home repairs. Simple installation with basic tools; align the disc window to the switch mechanism and secure according to the machine service instructions. Inspect the surrounding door area for wear or damage and any additional worn components as needed. Practical use scenarios a cracked or worn disc window after accidental impact or longterm wear that causes intermittent door switch errors. Use during routine door or refurbishment to ensure the door switch engages cleanly with or reassembled door parts. Service situation where the washing machine shows a doorrelated error code and a quick, targeted parts replacement restores normal operation. Why choose this replacement part Targeted fix that addresses door switch engagement issues without unnecessary extra repairs. Compatible with the listed machine models to ensure correct fit and function. Suitable for service technicians and doityourself repairs when the small door switch disc window is identified as the faulty component.