4-wire. N12-5 0857.Defrost Temperature Control.SNR-015
This device is an SNR-015 Defrost Temperature Control, a specialized 4-wire bimetal thermostat assembly used in frost-free refrigerators and freezers. is commonly used as a replacement part for LG and Kenmore refrigeration models.
Technical Specifications
- Part Number: SNR-015 / N12-5 0857.
- Voltage/Current Rating: Typically rated for AC 250V / 10A.
- Operational Temperature: The bimetal switch is typically designed to open (cut power) at -5°C (23°F) to terminate the defrost cycle once ice has melted.
- Configuration: 4-Wire Assembly, which typically includes a bimetal thermostat and an integrated thermal fuse for enhanced safety.
- Safety Fuse: Includes an internal thermal safety fuse rated at 72°C (161.6°F) to permanently cut power if the defrost heater fails to turn off, preventing overheating and potential fire hazards.
Core Function & Features
This component is a critical part of the automatic defrost system, usually mounted directly onto the evaporator coils.
- Defrost Monitoring: It senses the temperature of the evaporator. When the coil reaches a specific warm temperature, the bimetal disc inside “pops” open, interrupting the circuit to the defrost heater to ensure the unit doesn’t overheat.
- 4-Wire Precision: Compared to standard 2-wire models, the 4-wire configuration allows for more precise temperature monitoring and often integrates a separate sensor or fuse line for better control board feedback.
- Environmental Protection: The bimetal and fuse are encased in a waterproof, transparent plastic sleeve to protect the electrical contacts from moisture and ice buildup common in freezer environments.
Common Failure Symptoms
If this part is faulty, your refrigerator may experience:
- Freezer Frost Build-up: Heavy ice on the evaporator coils that blocks airflow.
- Warm Fridge Section: Because air cannot flow through the iced-up coils, the fresh food section will fail to stay cool.
- Continuous Running: The compressor may run constantly to compensate for the lack of cooling efficiency.
Description
Description
This device is an SNR-015 Defrost Temperature Control, a specialized 4-wire bimetal thermostat assembly used in frost-free refrigerators and freezers. is commonly used as a replacement part for LG and Kenmore refrigeration models.
Technical Specifications
- Part Number: SNR-015 / N12-5 0857.
- Voltage/Current Rating: Typically rated for AC 250V / 10A.
- Operational Temperature: The bimetal switch is typically designed to open (cut power) at -5°C (23°F) to terminate the defrost cycle once ice has melted.
- Configuration: 4-Wire Assembly, which typically includes a bimetal thermostat and an integrated thermal fuse for enhanced safety.
- Safety Fuse: Includes an internal thermal safety fuse rated at 72°C (161.6°F) to permanently cut power if the defrost heater fails to turn off, preventing overheating and potential fire hazards.
Core Function & Features
This component is a critical part of the automatic defrost system, usually mounted directly onto the evaporator coils.
- Defrost Monitoring: It senses the temperature of the evaporator. When the coil reaches a specific warm temperature, the bimetal disc inside “pops” open, interrupting the circuit to the defrost heater to ensure the unit doesn’t overheat.
- 4-Wire Precision: Compared to standard 2-wire models, the 4-wire configuration allows for more precise temperature monitoring and often integrates a separate sensor or fuse line for better control board feedback.
- Environmental Protection: The bimetal and fuse are encased in a waterproof, transparent plastic sleeve to protect the electrical contacts from moisture and ice buildup common in freezer environments.
Common Failure Symptoms
If this part is faulty, your refrigerator may experience:
- Freezer Frost Build-up: Heavy ice on the evaporator coils that blocks airflow.
- Warm Fridge Section: Because air cannot flow through the iced-up coils, the fresh food section will fail to stay cool.
- Continuous Running: The compressor may run constantly to compensate for the lack of cooling efficiency.
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