An apparatus and method for detecting a defect, in particular a leakage, of a housing of a controller includes (i) capturing a first characteristic variable, which characterizes a humidity within the housing, (ii) determining a parameter depending on the first characteristic variable, wherein the parameter characterizes a dynamic of the humidity within the housing, and (iii) comparing the parameter with at least one predetermined threshold value or one predetermined range of validity, wherein a defect of the housing is detected if the parameter exceeds or falls below the at least one threshold value or the range of validity. A vehicle including a controller having a housing and the apparatus is also disclosed.

Disclosed are cooling systems and methods for detecting coolant leakage. Processors of servers are attached to cold plates. An internal liquid coolant is contained in a coolant reservoir and is circulated through the cold plates via a coolant distribution manifold. Coolant leakage is detected based at least on a level of the internal liquid coolant in a tapered chamber of the coolant distribution manifold.