r/MiniPCs • u/MixtureBeneficial807 • 2h ago
Minisforum UM870 Slim – CPU Fan Keeps Cycling On and Off at 25–26°C
Hi everyone,
I have a Minisforum UM870 Slim running Proxmox, and it worked without any problems for over a month. Then I had a minor issue with a Nextcloud container that had become unresponsive, causing the CPU to run under heavy load for several hours. I eventually deleted the container.
However, ever since that incident, I've been experiencing an issue with the CPU fan. It shuts off when the CPU temperature drops to 25°C, which is fine, but then it starts running audibly again as soon as the temperature reaches 26°C.
In other words, the fan runs and cools the CPU down to below 25°C, then stops. With the fan off, the CPU heats up again to above 26°C, causing the fan to start up again. This cycle repeats approximately every two minutes.
Surely this can't be normal. I've tried everything I can think of. My BIOS is running version 1.10, and I've already spent over a week communicating with technical support. I even installed Windows 11 to rule out a software-related issue, but the problem persists.
Please help me. This is driving me crazy!
