2-wire.Defrost Temperature Control Wire,SNR-006
The image shows an SNR-006 Defrost Temperature Control Wire, a critical bimetal safety component for refrigeration systems. This specific model is a “bagged” bimetal thermostat designed to withstand the high-moisture environment of a freezer evaporator.
Core Function & Working Principle
This device acts as a temperature-sensitive switch that regulates the defrost cycle to prevent your refrigerator from overheating:
- Defrost Initiation: When the evaporator coils reach a sufficiently low temperature, the bimetal disc inside closes, allowing current to flow to the defrost heater.
- Heat Protection: Once the frost has melted and the coils reach a safe upper limit (typically around to or to the bimetal snaps open, immediately cutting power to the heater.
Technical Specifications
- Model Number: SNR-006.
- Type: 2-wire bimetal thermostat (normally open).
- Wiring: Features long, orange-insulated lead wires terminated with bullet connectors for direct plug-in installation.
- Operating Voltage: Typically rated for AC 250V / 10A.
- Design: The sensor is sealed in a transparent plastic housing to prevent moisture ingress, which is a common cause of failure in standard thermostats.
Common Issues Fixed
Replacing this part typically resolves the following refrigerator symptoms:
- Freezer not defrosting: Excessive ice buildup on the back wall or evaporator coils.
- Fridge too warm: Ice buildup blocks airflow from the freezer to the refrigerator compartment.
- Constant running: The compressor runs continuously because the unit cannot maintain the correct temperature.
Description
Description
The image shows an SNR-006 Defrost Temperature Control Wire, a critical bimetal safety component for refrigeration systems. This specific model is a “bagged” bimetal thermostat designed to withstand the high-moisture environment of a freezer evaporator.
Core Function & Working Principle
This device acts as a temperature-sensitive switch that regulates the defrost cycle to prevent your refrigerator from overheating:
- Defrost Initiation: When the evaporator coils reach a sufficiently low temperature, the bimetal disc inside closes, allowing current to flow to the defrost heater.
- Heat Protection: Once the frost has melted and the coils reach a safe upper limit (typically around to or to the bimetal snaps open, immediately cutting power to the heater.
Technical Specifications
- Model Number: SNR-006.
- Type: 2-wire bimetal thermostat (normally open).
- Wiring: Features long, orange-insulated lead wires terminated with bullet connectors for direct plug-in installation.
- Operating Voltage: Typically rated for AC 250V / 10A.
- Design: The sensor is sealed in a transparent plastic housing to prevent moisture ingress, which is a common cause of failure in standard thermostats.
Common Issues Fixed
Replacing this part typically resolves the following refrigerator symptoms:
- Freezer not defrosting: Excessive ice buildup on the back wall or evaporator coils.
- Fridge too warm: Ice buildup blocks airflow from the freezer to the refrigerator compartment.
- Constant running: The compressor runs continuously because the unit cannot maintain the correct temperature.
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