If you’re getting either the “Error: CPU Fan Has Failed!” or “CPU Fan Error,” here are the solutions that might work for you: Fix #1: Open BIOS settings.

If you see 511 CPU Fan not detected error during boot on a black screen, then this guide will help you resolve the error. It could be a hardware issue.

If you encounter Processor Fan Error Code 2000-0511 on your Windows 11/10 Dell computer, it could be a BIOS setting or a mechanical error.

Another common cause of the "CPU Over Temperature Error" message is the accumulation of dust and debris on the CPU cooler's fan blades.

How to fix CPU Fan Error on Windows 10/11? The CPU Fan Error usually occurs when you’re trying to power on your computer or laptop, or when the system is on start-up.