Maytag Refrigerator MSD2957AEB Freezer section too warm

Adaptive defrost control board.

The Defrost Heater Assembly is an OEM replacement part for Whirlpool refrigerators. Located behind the freezer walls, it prevents ice buildup during automatic defrost cycles. Consistent performance is needed to maintain ideal temperatures. The defrost thermostat is included in the assembly.

Causes of a bad defrost heater assembly can include overheating from being covered in frost, corrosion from moist environments, or broken filaments due to vibration.

Symptoms include: 

• Ice accumulating on freezer walls instead of melting away
• Refrigerator failing to properly defrost 
• Fault codes displayed related to defrost functions

Compatible with KitchenAid, Jenn-Air, and other brands, it ensures prolonged efficiency.

This evaporator fan motor circulates cold air across the evaporator coils and through the freezer and fresh-food sections to maintain even temperatures. Replacing a failed or noisy motor restores proper airflow and dependable cooling performance.

• Drives the evaporator fan blade to move air over the coils and throughout the cabinet
• Helps maintain consistent temperatures between freezer and refrigerator compartments
• Failure symptoms include weak/no airflow, the fan not running, loud squealing/rumbling, or the fresh-food section warming up
• Poor airflow can also lead to frost or ice buildup on the freezer back panel

• Disconnect power before servicing; wear cut-resistant gloves and eye protection
• Access the motor behind the freezer's rear panel; use caution around sharp metal and evaporator fins
• Note wire positions; transfer the fan blade and any brackets/grommets from the original motor; secure wiring connections
• Ensure the blade spins freely; engage the door switch when testing and strong airflow after reassembly