4-wire.REF. Defrost Temperature Control. SNR-019.
This device is an SNR-019 Defrost Temperature Control, a 4-wire bimetal thermostat and thermal fuse assembly used in frost-free refrigerators. It is primarily designed as a replacement part for LG and Whirlpool refrigeration models.
Technical Specifications
- Part Number: SNR-019 (marked with 13~4,X233).
- Replacement Compatibility: Often replaces OEM parts like 6615JB2003J or 6615JB2001M.
- Voltage/Current Rating: Typically rated for AC 220V/230V or AC 250V / 10A.
- Operating Temperatures:
- Thermostat: Designed to open at approximately 13°C and close at -4°C. A standard defrost termination temperature is generally between 13°C (55°F) and 15°C (60°F) to ensure the evaporator coil is fully clear of ice.
- Thermal Fuse: Includes an internal safety fuse (often rated for 72°C) that acts as a permanent fail-safe to cut power if the defrost heater fails to shut off.
- Configuration: 4-Wire Assembly with a blue plastic 4-pin connector. The components are sealed in a moisture-proof pink plastic sleeve for durability in high-humidity freezer environments.
Core Functionality
This assembly is a critical regulator for the automatic defrost system, usually clipped directly onto the evaporator coil:
- Defrost Regulation: The bimetal switch monitors the evaporator temperature. When it senses the coil has warmed up enough to melt all frost, it opens the circuit to stop the defrost heater.
- Overheat Protection: The integrated thermal fuse provides a secondary safety layer. If the primary bimetal switch fails to open, the fuse will blow to prevent potential fire hazards or damage to the refrigerator’s interior.
Common Failure Symptoms
If this part is faulty, your refrigerator may experience:
- Heavy Frost/Ice Build-up: On the back panel of the freezer, which blocks airflow.
- Warm Fridge Section: While the freezer remains cold, the fresh food section stays warm because air cannot circulate through the iced-up evaporator coils.
- Continuous Running: The compressor may run constantly to try and reach the set temperature through the insulating layer of ice.
Description
Description
This device is an SNR-019 Defrost Temperature Control, a 4-wire bimetal thermostat and thermal fuse assembly used in frost-free refrigerators. It is primarily designed as a replacement part for LG and Whirlpool refrigeration models.
Technical Specifications
- Part Number: SNR-019 (marked with 13~4,X233).
- Replacement Compatibility: Often replaces OEM parts like 6615JB2003J or 6615JB2001M.
- Voltage/Current Rating: Typically rated for AC 220V/230V or AC 250V / 10A.
- Operating Temperatures:
- Thermostat: Designed to open at approximately 13°C and close at -4°C. A standard defrost termination temperature is generally between 13°C (55°F) and 15°C (60°F) to ensure the evaporator coil is fully clear of ice.
- Thermal Fuse: Includes an internal safety fuse (often rated for 72°C) that acts as a permanent fail-safe to cut power if the defrost heater fails to shut off.
- Configuration: 4-Wire Assembly with a blue plastic 4-pin connector. The components are sealed in a moisture-proof pink plastic sleeve for durability in high-humidity freezer environments.
Core Functionality
This assembly is a critical regulator for the automatic defrost system, usually clipped directly onto the evaporator coil:
- Defrost Regulation: The bimetal switch monitors the evaporator temperature. When it senses the coil has warmed up enough to melt all frost, it opens the circuit to stop the defrost heater.
- Overheat Protection: The integrated thermal fuse provides a secondary safety layer. If the primary bimetal switch fails to open, the fuse will blow to prevent potential fire hazards or damage to the refrigerator’s interior.
Common Failure Symptoms
If this part is faulty, your refrigerator may experience:
- Heavy Frost/Ice Build-up: On the back panel of the freezer, which blocks airflow.
- Warm Fridge Section: While the freezer remains cold, the fresh food section stays warm because air cannot circulate through the iced-up evaporator coils.
- Continuous Running: The compressor may run constantly to try and reach the set temperature through the insulating layer of ice.
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