DOKK / manpages / debian 12 / zcfan / zcfan.1.en
zcfan(1) General Commands Manual zcfan(1)

zcfan - zero-configuration fan control daemon for ThinkPads

zcfan is a minimal, zero-configuration fan control daemon for ThinkPads.

zcfan does not take any options. If any are provided, a help message will be printed and zcfan will exit.

zcfan has the following default fan states:

Config name thinkpad_acpi fan level Default trip temperature (C)
max_temp 7 90
med_temp 4 80
low_temp 1 70

You can optionally override this configuration at /etc/zcfan.conf with your desired threshold values in the following format:

max_temp 85
med_temp 70
low_temp 55

If no trip temperature is reached, the fan will be turned off.

We will only reduce the fan level again once:

1.
The temperature is now at least 10C below the trip point, and
2.
At least 3 seconds have elapsed since the initial trip.

This avoids unnecessary fluctuations in fan speed.

thinkpad-acpi must be loaded with fan_control=1.

thinkfan(1)

Chris Down chris@chrisdown.name

Please send bug reports to https://github.com/cdown/zcfan/issues.