Notebook Boot and Lockup

I have a HP Spectre x360 13-w023dx which gave a "System Fan (90B)" error a little over a year ago, while still under warranty.  I had HP fix it (ticket [edit].  I've hardly used it at all because I had to buy another laptop to use while it was gone and I've primarily used that one.  After probably less than 20 hours of actual use since the repair I pulled the laptop out at a trade show to demonstrate my software and it gave the exact same "System Fan (90B)" error when I tried to boot it (great timing -- fortunately I had a spare back in my hotel room).  If I hit "enter" and force it to boot into Windows (against the BIOS recommendation to shut it down) I do hear the fan running.

The warranty has expired.  Any chance of HP fixing this for me free of charge (since they apparently didn't do a very good job the first time)?  If not, any other recommendations for this problem?  The HP support tool says there are no updates available (firmware version was considered a possible problem last time I encountered the error, and I updated it then) and I blew compressed air in the vents already -- it didn't help.