Exact Replacement Parts 4387503 Defrost Thermostat

Product Description

The EXACT REPLACEMENT PARTS 4387503 is a defrost thermostat designed to monitor and regulate the defrost cycle in refrigeration equipment. Rated at L62-14C, this thermostat senses evaporator coil temperature and signals the defrost heater circuit to terminate the defrost cycle when the correct temperature is reached, preventing overheating and ice buildup issues. It features a 3/8-inch side push-on clip for secure mounting and 6-inch leads with stripped wire ends for straightforward field connection. Licensed appliance technicians and refrigeration service pros typically handle this repair.

This defrost thermostat is a direct replacement for the original Whirlpool 4387503, commonly found in residential refrigerators and freezers that use an automatic defrost system. It fits applications where the original thermostat has failed, causing excessive frost accumulation, a unit that runs continuously without defrosting, or a defrost cycle that does not terminate properly. Cross-reference part numbers include 4387503, ER4387503, and WP4387503, making it straightforward to verify fitment against the original part tag.

Key Features

• L62-14C temperature rating for precise defrost cycle termination
• 3/8-inch side push-on clip mount for secure, tool-free attachment to the evaporator
• 6-inch leads with stripped wire ends for fast, clean field connections
• Direct OEM-style replacement for Whirlpool original part 4387503
• Cross-references ER4387503 and WP4387503 for easy part verification

Compatibility

Direct replacement for Whirlpool part numbers 4387503, WP4387503, and ER4387503. Verify the original part number on the appliance label or existing thermostat before ordering to confirm fitment.

Installation Notes

Installation is performed by a qualified appliance or refrigeration technician. Disconnect power to the refrigerator or freezer at the outlet or breaker before accessing the evaporator compartment. The defrost thermostat clips onto the evaporator tubing using the push-on clip and connects in-line with the defrost heater circuit. Do not apply heat or bend the thermostat body during installation, as this can alter the calibrated response temperature.