4387503 Refrigerator Defrost Thermostat – Bimetal Replacement

$6.77 $9.11

4387503 Bimetal Defrost Thermostat – Direct Replacement for Your Refrigerator

Keep your refrigerator's defrost cycle running smoothly with this durable 4387503 Bimetal Defrost Thermostat. This clip-on thermostat mounts directly onto the evaporator and monitors temperature during the defrost cycle, automatically switching off the defrost heater once ice and frost have fully melted — helping to protect your appliance and maintain consistent internal temperatures.

This is an ideal direct replacement if your refrigerator is leaking, experiencing inconsistent temperatures (running too warm or too cold), showing excessive ice buildup, or running longer than usual. Engineered for improved durability and high reliability, it features updated characteristics over older original-equipment parts.

Key Features

Direct Replacement: Compatible with part number 4387503 and a wide range of cross-reference numbers
Bimetal Design: Accurately senses evaporator temperature to control the defrost heater cycle
Clip-On Installation: Simple, tool-free mounting directly onto the evaporator — no complicated setup
Durable Metal Construction: Built for long-lasting, dependable performance
Improved Design: Enhanced durability and stable characteristics over standard OEM specs

Specifications

Manufacturer Part Number: 4387503
Material: Metal
Size: 2.6 × 2.8 cm
Color: White
Made in: Mainland China

Compatible / Replaces Part Numbers

2149641, 2149643, 2163894, 2172694, 2182380, 2183072, 2221677, 4343917, 586213, 61002113, AH371255, EA371255, PS371255, R0950042

Package Contents

1 × 4387503 Refrigerator Defrost Thermostat

Notes

Please refer to the size listed in specifications — product images are not to scale.
Allow slight differences due to manual measurement.
Color may vary slightly due to monitor display settings.

Frequently Asked Questions

Q: What does the 4387503 defrost thermostat do in a refrigerator?

A: The 4387503 bimetal defrost thermostat clips onto the refrigerator's evaporator and monitors temperature during the defrost cycle. When the evaporator reaches the correct temperature and ice or frost has melted, the thermostat automatically shuts off the defrost heater, preventing overheating and protecting the appliance.

Q: How do I know if my defrost thermostat needs to be replaced?

A: Common signs that the defrost thermostat may need replacing include excessive ice or frost buildup inside the freezer, inconsistent temperatures (too warm or too cold), water leaking from the unit, or the refrigerator running continuously for longer than normal.

Q: Is this thermostat compatible with my refrigerator model?

A: This thermostat is designed as a direct replacement for OEM part number 4387503 and also replaces part numbers: 2149641, 2149643, 2163894, 2172694, 2182380, 2183072, 2221677, 4343917, 586213, 61002113, AH371255, EA371255, PS371255, and R0950042. Check your appliance's model documentation or existing part number to confirm compatibility before ordering.

Q: Is installation difficult?

A: No. This is a clip-on thermostat that attaches directly to the evaporator without special tools. It is designed as a straightforward drop-in replacement for the original part, making the installation process quick and easy for most DIY appliance repairs.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.