Elevator Mechanic Practice Exam 2025 - Free Elevator Mechanic Practice Questions and Study Guide

The situation described indicates that there is power at specific points but no voltage at the terminal associated with the close door limit switch, suggesting a malfunction within that switch itself.

A door limit switch is designed to signal the elevator control system when the doors are fully closed. If the switch is malfunctioning, it may not properly send the signal needed to operate the doors, which explains the presence of power at one point yet a lack of voltage at the limit switch terminal.

Considering this context, a malfunction of the door limit switch is the most likely reason for the issues observed. This specific failure would impede the function of the close door limit switch, explaining why the door cannot close properly. The other options involve different components or issues that do not directly correlate with the symptoms presented in this scenario. Thus, the diagnosis points clearly to the limit switch as the failure point.