# My pironman5 PWM Tower Cooler doesn't work past boot

**URL:** <https://forum.sunfounder.com/t/my-pironman5-pwm-tower-cooler-doesnt-work-past-boot/3718>\
**Category:** Accessories for Raspberry Pi and Arduino\
**Created:** [August 25, 2025, 1:00pm UTC](https://forum.sunfounder.com/t/my-pironman5-pwm-tower-cooler-doesnt-work-past-boot/3718 "2025-08-25T13:00:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![kepler](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.sunfounder.com/kepler/32/1880_2.png) [@kepler](https://forum.sunfounder.com/u/kepler)\
**Post date:** [August 25, 2025, 1:00pm UTC](https://forum.sunfounder.com/t/my-pironman5-pwm-tower-cooler-doesnt-work-past-boot/3718/1 "2025-08-25T13:00:00Z")

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hey, i recently bought the pironman5 case and everything works fine except the pwm ice cube tower cooler. i tried many things, i check the conections and everything is fine (it turns on when i turn my pi on) but it stops and never turns on again. i did a few stress tests and it reached 62 degrees celsious and it didnt turn on. i also reinstaled the os on the sd card (oficial raspi sd card) and updated the system. The fan doesnt turn on. what should i do?

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**Author:** ![dl9hda](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@dl9hda](https://forum.sunfounder.com/u/dl9hda)\
**Post date:** [August 25, 2025, 6:28pm UTC](https://forum.sunfounder.com/t/my-pironman5-pwm-tower-cooler-doesnt-work-past-boot/3718/2 "2025-08-25T18:28:38Z")

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Hi, had the same issue.

Step1:

sudo pinctrl FAN\_PWM a0

Step 2: I put these lines in the /boot/firmware/config.txt

#Fan PWM  
dtparam=cooling\_fan=on  
dtparam=fan\_temp0=50000  
dtparam=fan\_temp0\_hyst=5000  
dtparam=fan\_temp0\_speed=75  
dtparam=fan\_temp1=60000  
dtparam=fan\_temp1\_hyst=5000  
dtparam=fan\_temp1\_speed=125  
dtparam=fan\_temp2=67500  
dtparam=fan\_temp2\_hyst=5000  
dtparam=fan\_temp2\_speed=175  
dtparam=fan\_temp3=75000  
dtparam=fan\_temp3\_hyst=5000  
dtparam=fan\_temp3\_speed=250

Step 3:

reboot

greetings

dl9hda

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<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:** [August 26, 2025, 3:58am UTC](https://forum.sunfounder.com/t/my-pironman5-pwm-tower-cooler-doesnt-work-past-boot/3718/3 "2025-08-26T03:58:33Z")

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Please also check whether the pins of the Pi 5’s fan interface are properly aligned and connected to the heatsink connector.  
Some users have encountered bent pins on the Pi 5’s fan interface due to misalignment with the heatsink connector, which prevented the connection from being established. Without a proper connection to the heatsink connector, the cooling fan will definitely not work.  
Please refer to the attached image for clarification.

 ![347e902163cce1e5a22dbcee73fec384](https://canada1.discourse-cdn.com/flex029/uploads/sunfounder/original/2X/2/23b111c74f0f01505330a7050a8e8544cb952f34.jpeg)

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<div class="post-metadata">

**Author:** ![kepler](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.sunfounder.com/kepler/32/1880_2.png) [@kepler](https://forum.sunfounder.com/u/kepler)\
**Post date:** [September 14, 2025, 2:17pm UTC](https://forum.sunfounder.com/t/my-pironman5-pwm-tower-cooler-doesnt-work-past-boot/3718/4 "2025-09-14T14:17:59Z")

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Hello! Thank you so much! i tried it and it worked right away. 🙂