Replacement Defrost Heater for Part WP12729128 (Compatible with Whirlpool Refrigerators) Overview This replacement defrost heater is designed to restore proper defrost operation in refrigerators that use part number WP12729128. It matches the original component in fit and function to ensure reliable performance and straightforward installation. Key benefits Restores defrost function to prevent frost buildup and maintain cooling efficiency. Direct fit replacement: designed to match original size, mounting, and electrical connections for a seamless swap. Easy installation for experienced DIYers and professional technicians. compatibility: fits and functions like the original component when used with compatible appliance models. Provides a practical option that avoids costly appliance replacement. Important attributes Function: Defrost heater for refrigerator evaporator assemblies. Compatibility: Replacement for part WP12729128; compatible with refrigerators that require this part number. Provide your appliance model number to confirm fit before installation. Fit and performance: Built to match original equipment in physical dimensions and electrical connection so it performs as intended in the defrost cycle. Typical use scenarios a failed defrost heater when you notice excessive frost or ice buildup on the evaporator or inside the freezer compartment. Use during routine refrigerator repairs to restore proper defrost cycling and improve temperature stability. Install as part of a service call when troubleshooting defrost system faults such as frequent compressor runtimes or evaporator icing. Installation and compatibility note Provide your appliance model number to confirm that this replacement part is correct for your refrigerator. When matched to the correct model, the part fits and functions like the original component.