4387503 Refrigerator Defrost Thermostat Bimetal Replacement

4387503 Bimetal Defrost Thermostat – Direct Replacement Part

Keep your refrigerator running at its best with this durable 4387503 Bimetal Defrost Thermostat. Designed as a direct drop-in replacement, this clip-on thermostat monitors the evaporator temperature during the defrost cycle and automatically switches off the defrost heater once the ice or frost has melted — protecting your appliance and maintaining consistent temperatures.

Why Replace Your Defrost Thermostat?

Common signs that this part needs replacing include:

• Unexpected water leaks from the fridge
• Inconsistent internal temperatures (too warm or too cold)
• Excessive ice or frost buildup inside the freezer or fridge compartment
• The compressor or defrost heater running longer than normal

Key Features

• Direct Replacement: Compatible with part number 4387503 and multiple cross-reference numbers (see below)
• Bimetal Design: Accurately senses temperature changes during the defrost cycle for reliable performance
• Improved Durability: Enhanced design for greater stability, high reliability, and long service life
• Easy Installation: Clip-on mount for quick, tool-friendly fitting — no specialist skills required
• Compact Size: Measures approximately 2.6 × 2.8 cm for a neat, precise fit

Specifications

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

Note: Actual size may differ slightly from product photos — please refer to the dimensions listed above. Minor measurement tolerances may apply. Colors may vary slightly between different monitor displays.

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Frequently Asked Questions

Q: What refrigerator models is the 4387503 defrost thermostat compatible with?

A: The 4387503 bimetal defrost thermostat is designed to replace a wide range of original parts, including cross-reference numbers 2149641, 2149643, 2163894, 2172694, 2182380, 2183072, 2221677, 4343917, 586213, 61002113, AH371255, EA371255, PS371255, and R0950042. Always verify your appliance's part number before purchasing to ensure compatibility.

Q: How does the defrost thermostat work?

A: This clip-on bimetal defrost thermostat monitors the temperature of the evaporator during the defrost cycle. When the ice or frost has fully melted and the evaporator reaches the set cut-off temperature, the thermostat automatically switches off the defrost heater — preventing overheating and protecting your refrigerator's components.

Q: Is this thermostat easy to install yourself?

A: Yes! The 4387503 defrost thermostat features a clip-on design for straightforward DIY installation. It clips directly onto the evaporator coil in place of the old part, making it accessible for most home DIY repairs. Always unplug the appliance before beginning any repair work for safety.

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.