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Home >> Chevrolet >> 1975 >> Luv >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Catalytic Converters >> Operation >> Thermal Sensor & THERMO Controller
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Thermal Sensor & THERMO Controller

Thermo sensor is inserted into converter, in a special stainless steel sheath, to determine converter temperatures. This device sends varying electrical signals to thermo controller, which sends signal to energize or de-energize solenoid portion of vacuum switching valve. Thermo controller also connects to the relay which controls warning buzzer and warning lamp. See Figure.