Refrigerator Defrost Thermostat For: Whirlpool 4387489 AP3108444 PS371244 ER4387489

Refrigerator Defrost Thermostat – Whirlpool

This refrigerator defrost thermostat monitors evaporator temperature and helps control the defrost cycle. A failed thermostat can contribute to excess frost, poor cooling, or an incorrect defrost cycle. This ERP thermostat is a direct replacement for compatible Whirlpool applications and features an L70-58F rating with 6-inch stripped wire leads.

Compatible Part Numbers

• 4387489
• AP3108444
• PS371244
• ER4387489

Key Features

• Direct replacement: Replaces the listed defrost thermostat numbers on compatible refrigerator models.
• Primary function: Senses evaporator temperature to help regulate the defrost cycle.
• Key benefit: Helps support proper cooling and frost control when the original thermostat has failed.
• Installation ease: Includes 6-inch stripped wire leads for model-specific installation.

Fixes These Symptoms

• Excess frost or ice buildup on the evaporator
• Refrigerator or freezer is not cooling properly
• Defrost cycle runs incorrectly or does not start
• Temperature fluctuates inside the appliance

Compatible Brands

• Whirlpool

Disconnect electrical power before installation. Match connector positions and mounting, verify the L70-58F rating, and never bypass a thermal safety control. Reinstall covers before testing.

Always verify your model number before ordering. Check the label inside the refrigerator to confirm compatibility.