What component in a cooling system alerts the electronic controller of pressure changes?

The transducer is the component in a cooling system that alerts the electronic controller of pressure changes. It functions by converting the pressure of the refrigerant into an electrical signal, which the controller can then interpret to make decisions regarding system operation. This helps in maintaining optimal pressure levels and ensuring that the cooling system functions efficiently.

In the context of a cooling system, accurate pressure monitoring is crucial for maintaining performance and preventing potential failures. The electronic controller relies on data from the transducer to make real-time adjustments, such as modifying compressor speed or adjusting the position of the expansion valve based on the pressures detected.

Other components like the condenser coil, compressor, and expansion valve play significant roles in the cooling process but do not directly notify the electronic controller about pressure changes. The condenser coil is responsible for rejecting heat, the compressor circulates the refrigerant, and the expansion valve regulates flow; they won't provide the necessary data for monitoring pressure on their own. Thus, the transducer stands out as the key element for signal transmission regarding pressure variations in the system.