Which component can cause a liquid level control to malfunction if it becomes dirty?

The probe is the component responsible for sensing the liquid level in a system, and if it becomes dirty, it cannot accurately read the liquid level. Probes often rely on conductivity or other sensing methods to determine whether the liquid is above or below a certain level. When contaminants such as limescale, grease, or other residues accumulate on the probe, it can interfere with its ability to provide precise readings. This malfunction can lead to improper control of the liquid level, which may cause overflows or insufficient fluid levels that can impact the operation of the equipment. Ensuring that the probe is clean is crucial for maintaining accurate liquid level sensing and ensuring the proper functioning of the entire system.