# Pironman 5 tower cooler fan will not com on after boot

**URL:** <https://forum.sunfounder.com/t/pironman-5-tower-cooler-fan-will-not-com-on-after-boot/4625>\
**Category:** General\
**Created:** [May 7, 2026, 11:33pm UTC](https://forum.sunfounder.com/t/pironman-5-tower-cooler-fan-will-not-com-on-after-boot/4625 "2026-05-07T23:33:59Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![ekkenny](https://avatars.discourse-cdn.com/v4/letter/e/46a35a/32.png) [@ekkenny](https://forum.sunfounder.com/u/ekkenny)\
**Post date:** [May 7, 2026, 11:33pm UTC](https://forum.sunfounder.com/t/pironman-5-tower-cooler-fan-will-not-com-on-after-boot/4625/1 "2026-05-07T23:33:59Z")

</div>

I see lots of post but no definite solutions. I have even tried to start it with the pironman5 service stopped and nothing happens.

I put dtparam directives in config.sys  
dtparam=cooling\_fan=on  
dtparam=fan\_temp0=40000

It briefly starts and stops while booting, but after that is just sits there being useless.

Has anyone gotten this to work? A genuine solution would be appreciated.

Thanks

Ed

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 8, 2026, 9:53am UTC](https://forum.sunfounder.com/t/pironman-5-tower-cooler-fan-will-not-com-on-after-boot/4625/2 "2026-05-08T09:53:42Z")

</div>

The tower cooler is directly controlled by the Raspberry Pi system and does not depend on the Pironman5 service.  
Please try running the following commands to check if the fan works properly.  
These three commands correspond to: full speed / stop / variable speed based on temperature:

pinctrl FAN\_PWM op dl # enable fan (low active)

pinctrl FAN\_PWM op dh # disable fan (high active)

pinctrl FAN\_PWM a0 # auto mode (system temperature control)

---

<div class="post-metadata">

**Author:** ![ekkenny](https://avatars.discourse-cdn.com/v4/letter/e/46a35a/32.png) [@ekkenny](https://forum.sunfounder.com/u/ekkenny)\
**Post date:** [May 9, 2026, 11:56am UTC](https://forum.sunfounder.com/t/pironman-5-tower-cooler-fan-will-not-com-on-after-boot/4625/3 "2026-05-09T11:56:08Z")

</div>

Thank you! I got it to go on.

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 11, 2026, 1:20am UTC](https://forum.sunfounder.com/t/pironman-5-tower-cooler-fan-will-not-com-on-after-boot/4625/4 "2026-05-11T01:20:35Z")

</div>

Great,if you have any further questions, please feel free to ask.