2-wire.REF. Defrost Temperature Control Wire. SNR-005
The image shows an SNR-005 Defrost Temperature Control Wire, a specialized bimetal defrost thermostat used to manage cooling cycles in refrigeration systems.
Core Function & Features
This component is a temperature-sensitive switch that protects the refrigerator from overheating during a defrost cycle:
- Automatic Control: It monitors the evaporator coil temperature. When the coils get cold enough to frost, the thermostat closes to allow the defrost heater to turn on. Once the ice melts and the temperature rises (typically to about it opens the circuit to shut off the heater.
- Design: It features a bimetal disc sensor sealed within a blue-tinted moisture-proof plastic housing. This “bagged” design protects the sensitive components from the high-moisture environment inside a freezer.
- Wiring: It is a 2-wire configuration (brown and grey leads) designed for easy integration into the existing defrost circuit of the appliance.
Symptoms of a Faulty Thermostat
If this part fails, you may notice the following issues with your refrigerator:
- Excessive Frost: If the thermostat stays open, the defrost heater will never turn on, leading to thick ice buildup on the back panel or evaporator coils.
- Warm Interior: If the coils are blocked by ice, air cannot circulate, causing the fridge and freezer sections to become too warm.
- Overheating: If the thermostat stays closed, the heater may stay on too long, potentially damaging plastic components inside the freezer.
Description
Description
The image shows an SNR-005 Defrost Temperature Control Wire, a specialized bimetal defrost thermostat used to manage cooling cycles in refrigeration systems.
Core Function & Features
This component is a temperature-sensitive switch that protects the refrigerator from overheating during a defrost cycle:
- Automatic Control: It monitors the evaporator coil temperature. When the coils get cold enough to frost, the thermostat closes to allow the defrost heater to turn on. Once the ice melts and the temperature rises (typically to about it opens the circuit to shut off the heater.
- Design: It features a bimetal disc sensor sealed within a blue-tinted moisture-proof plastic housing. This “bagged” design protects the sensitive components from the high-moisture environment inside a freezer.
- Wiring: It is a 2-wire configuration (brown and grey leads) designed for easy integration into the existing defrost circuit of the appliance.
Symptoms of a Faulty Thermostat
If this part fails, you may notice the following issues with your refrigerator:
- Excessive Frost: If the thermostat stays open, the defrost heater will never turn on, leading to thick ice buildup on the back panel or evaporator coils.
- Warm Interior: If the coils are blocked by ice, air cannot circulate, causing the fridge and freezer sections to become too warm.
- Overheating: If the thermostat stays closed, the heater may stay on too long, potentially damaging plastic components inside the freezer.
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