Multi-Functional Temperature Management: This refrigerator thermistor (P/N 2188819) performs critical functions including defrost cycle control, overheating protection, and precise temperature measurement. Directly replaces original sensors #1057763, 2216113, AH968736, EA968736, and PS968736 in compatible refrigerators. Comprehensive Appliance Compatibility: Compatible with Whirlpool refrigerator​​ models (MSF21D4MDE00-02, MSF21D4MDH00-01, MSF21D4MDM00-01), ​​fitting for Maytag refrigerator​​ units (MSF25D4MDE00-03, MSF25D4MDH00-02, MSF25D4MDM00-02), and for Kenmore/KitchenAid refrigerators with prefix 7GS2/7GF6. Also fits for Jenn-Air, Amana, Magic Chef, Admiral, Norge, and Roper units sharing these model platforms. Industrial-Grade Durability: Constructed with ​high-quality materials​ featuring a rugged overmolded design that provides an extra layer of protection against wear and tear. Rigorously tested to withstand repeated thermal cycling, offering extended service life compared to standard sensors. Simplified Installation Process: Easy installation requires only three steps: Disconnect refrigerator power, Remove old thermistor, Connect new sensor (plug-and-play design), Complete replacement typically takes under 2 minutes with no special tools required. Complete Kit & Support:Includes genuine 2188819 thermistor. For compatibility verification with RV refrigerator thermistor​​ applications or specific models like Norcold N611, contact our technical support team via Amazon Messages.