CPU Fan Error! In BIOS

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kiwis

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#304506 10-May-2023 10:56

Any idea what's causing this error?

Dynamic

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#3074449 10-May-2023 10:58

The most likely cause is the fan has developed a fault. It may be spinning slowly or have stopped spinning due to wear and tear. The fans have a speed sensor, so its possible this has stopped working. The fan's plug may have worked its way loose from the motherboard.

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michaelmurfy

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#3074450 10-May-2023 10:58

We don't have a crystal ball but seeing it states "CPU Fan Error" have you checked to see if the CPU fan is working? Is this a desktop PC or a laptop? Like, provide more information including troubleshooting you've done before asking here.

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kiwis

832 posts

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#3074453 10-May-2023 11:08

Sorry I tried to add, I've just had a water cooler installed. Do I need to change anything in BIOS?

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#3074459 10-May-2023 11:17

There will likely be an option in the bios to disable a failsafe for the CPU fan.

Not having a CPU fan running in an air-cooled system could be serious, so that's why the option is there to not start unless the fan is operating fine.

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Ruphus

465 posts

Ultimate Geek

#3074587 10-May-2023 16:22

kiwis:
Sorry I tried to add, I've just had a water cooler installed. Do I need to change anything in BIOS?

AIO or custom loop?

The AIO pump should be plugged into the CPU fan header on the motherboard. If it's plugged into the AIO pump header then you'll get this error and you will need to setup the BIOS to ignore the error.

Tzoi

424 posts

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#3074860 11-May-2023 02:35

Ruphus:
kiwis:

Sorry I tried to add, I've just had a water cooler installed. Do I need to change anything in BIOS?

AIO or custom loop?

The AIO pump should be plugged into the CPU fan header on the motherboard. If it's plugged into the AIO pump header then you'll get this error and you will need to setup the BIOS to ignore the error.

This depends on the AIO I think, sometimes plugging the pump into the CPU fan header means the pump doesn't run at full speed.

SpartanVXL

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#3074961 11-May-2023 11:16

There isn’t usually a header specifically for AIO pump, you are meant to use the CPU header at least for most water cooler AIO instructions. There is a OPT header which you can use for separate fans but most AIO connectors are daisy chained off the one plug.

Tldr; check the water cooler is plugged into the CPU fan header.

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Rickles

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#3075396 12-May-2023 11:17

Check for dirt and dust on both sides of the fan and base.

Jase2985

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#3075582 12-May-2023 18:44

@kiwis update please

Tinkerisk

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#3075676 13-May-2023 00:28

Looks like a towel got stuck in the fan - or a possum. 😄 @neb? But it could also be that the speed feedback of the water pump cannot keep up with that of the propeller. Who knows?

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neb

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#3075678 13-May-2023 00:42

kiwis:
Sorry I tried to add, I've just had a water cooler installed. Do I need to change anything in BIOS?

If it's a temperature-controlled fan then the watercooling may be sufficient to prevent it from ever starting, so the BIOS thinks it's failed. I had this when I build a silent PC some time ago, the cooling of a large, slow case fan drawing air over the giant CPU heatsink was enough that the CPU fan almost never ran, leading to BIOS-level alarms that it had failed.