I got an odd BIOS error about the fan not working in my laptop when I first started. The fan been rattling almost since I got it, I meant to clean it the last time I had it open. But I don’t know, I’ve been watching the temperature gauge on my laptop, and see no evidence of it malfunctioning. I guess if I notice things running hot on the gauges, I’ll turn it off, take it apart, see if I need to clean it or replace the fan. Fortunately HP parts tend to be quite cheap and easy to get on the Internet.