Bimetallic construction for reliable defrost control: this replacement defrost thermostat uses a bimetallic mechanism to provide lasting operation and accurate temperature control, helping prevent frost buildup and maintain cooling efficiency in your refrigerator. Easy installation process: designed for refrigerator models with a 4wire thermostat, it is straightforward to install for DIY repairs. unplug the refrigerator before starting and safely store perishable items during the process. Precise temperature regulation: activation at 7 degrees Celsius helps prevent excessive ice formation, supporting smooth refrigerator operation and energy efficiency while maintaining consistent cooling performance. General compatibility and specifications: measures 85 x 45 mm with a 23 cm wire length, compatible with various refrigerator models as a reliable replacement part to restore proper function and extend the life of your appliance. Practical use scenarios: Replacing a defective defrost thermostat in a standard household refrigerator prone to frost buildup. Performing a DIY maintenance task to restore efficient defrost control and stable cooling. Refurbishing an older unit that requires a precise 7°C defrost switch to control icing and improve overall performance.