How To Fix System Fan Error (90B) and Excessive Noise on HP x360 Laptop

After 10-11 months use of the HP x360 15-u011dx i7-4510u, I had 2 problems, the bad battery and now, the excessive fan noise and the System Fan Error (90B). The error 90B is caused by the fan blade touching the fan case due to excessive play in the bearing and the shaft and the system failed the speed sensing. The HP service is extremely Great, HP chat is always there and ready to help. The support service is extremely Quick, I do like HP products because of the after sales supports, although, the quality of the parts should be better and more reliable. Any how, since I don’t want to send the laptop back for a simple problem, I did it myself knowing that the warranty may be voided, but I only have 21 days left on my 1 year warranty.

4 thoughts to “How To Fix System Fan Error (90B) and Excessive Noise on HP x360 Laptop”

  1. Hey I have the same error code but instead of it making a loud fan noise, the fan is not turning at all and making 5 continuous clicking noises every 5 or so seconds. Also when I try to take the back case off, its stuck by the trackpad and I don’t want to break the case. You think its just stuck in their good or am I missing a 7th screw to remove it (same laptop as you)?

  2. I am finding it most difficult to understand from the pictures how you fixed the fan problem, which is what I have now. Would you mind telling me step by step? Thanks.

    1. Hello David,
      First, find out where the fan’s hitting while spinning, mine is hitting the case when it sagged down so I put some washers between the case and the fan. After a year, I bought a new fan and it’s done.

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