Final answer:
Search for the Chicago Central Help Desk extension is not an academic question but a request for organizational contact details. Extension numbers are usually provided by the specific institution, so contacting them directly or checking their website is suggested.
Step-by-step explanation:
The question regarding the Chicago Central Help Desk extension does not relate to an academic subject but appears to be a request for information about a specific organization or service's contact details. The extension number would typically be provided by the organization in question, such as a school or business, operating in the Chicago area. If you are looking for the help desk extension of a particular institution in Chicago, I would recommend contacting the organization directly or visiting their official website to obtain the most accurate and current information.