The Russell 103079-010 Defrost Termination Switch is a safety component used in refrigeration systems, specifically in coolers. It functions as a temperature-sensitive switch, monitoring the defrost cycle. During defrost, the switch opens, interrupting the heating element's power supply. Once the defrost cycle is complete and the evaporator coils have dried, the switch closes, allowin... https://partsfe.com/103079-010-russell-switchdefrost-term-cooler