The Russell 103079010 defrost termination switch helps prevent unnecessary heating by ending the defrost cycle once a compatible cooler’s evaporator coil reaches its preset temperature. This temperature-sensing, two-wire control monitors the coil during defrost operation and signals the control circuit to terminate the cycle when sufficient ice has melted. It also supports the system’... https://partsfe.ca/103079010-russell-switchdefrost-term-cooler