Car A/C Compressors Thermo Cut-Out

By 2 August 2014

Some compressors have a thermo cut-out (Fig. 2.19), an electrical switch that works on the principle of a bimetallic strip. If the temperature of the refrigerant in the compressor exceeds a safe limit (approx. 150°C) then the bimetallic strip bends and breaks the electrical connection to the compressor clutch.This shuts the system down.