I have had cooling fan issues for the last month or 2.
The fan would not start until I moved the connector. Then it would stop at times.
Today it wouldn't start at all so I blew compressed air at the fan blades and it started. Ran fine until I shut it down for lunch. Same routine after lunch. I decided to replace it finally.
Come to find out the wire that is supposed to be soldered to the connector was just a lump of solder but not meled to the connector.
The red wire is soldered solid but the black wire was just sitting through the hole in the little (tab) connection piece.

Shopbot said they don't do the work on that part.
If you have fan issues keep an eye on that senario.
I wonder where the Q.C. is on a part like that getting through.
I would think that went through a final inspection before shipping.