What happens when the long probes in a liquid level control short to ground?

When the long probes in a liquid level control short to ground, the system typically responds by allowing the unit to fill only once and subsequently requires a power reset. This is because a short circuit can cause the control system to recognize a false reading, often leading to an overload or activation of protective measures within the system. As a result, the liquid level control will disconnect or shut down to prevent damage or malfunction.

While the unit filling continuously might seem plausible, this usually occurs under normal functioning without a short circuit. Similarly, a complete failure of the control system isn't necessarily the immediate result of a short; the system may still engage in one filling cycle before requiring a power reset. Enhanced efficiency of the control in response to a short circuit is not an expected behavior, as shorts typically lead to erratic or uncontrolled operations rather than improvements in efficiency. Thus, the answer focuses on the necessary process of a one-time fill requiring a power reset to restore normal functionality.