HWMonitor Fan RPM Shows 0 or Missing: Windows Troubleshooting
Quick answer: Find out why a fan sensor reports 0 RPM or is absent in HWMonitor, and how to check if a fan is actually stopped.
Zero RPM can be a normal fan-stop mode
Many modern GPU fans intentionally stop at low temperatures, and some system fans follow zero-RPM curves. A zero reading alone does not prove the fan is broken.
Missing sensors can be a reporting limitation
HWMonitor needs firmware or controller access to read tachometer data. Fans attached to hubs, proprietary OEM controllers or certain laptop ECs may not be exposed individually.
Verify actual hardware behavior
Check fan movement visually when safe to do so and compare BIOS/UEFI monitoring or the system vendor’s fan utility. Avoid touching moving blades or opening a powered device. Confirm whether the reading changes under a normal workload.
When to investigate
If a fan physically fails to spin while temperatures rise abnormally, stop a demanding workload and inspect cooling hardware with the system powered off. If fans spin normally but RPM remains missing, treat it first as a sensor compatibility issue.
Further reading and software
View HWMonitor features and download options · Windows hardware topics · How technical information is checked
Frequently asked questions
Why do GPU fans show 0 RPM when idle?
A zero-RPM operating mode may deliberately stop them under light load.
Does missing RPM mean no fan is installed?
No. It often means the tachometer is not exposed to monitoring software.
CPUID.net Editorial Team · Updated October 28, 2026. Results depend on device hardware, firmware and OS configuration.