# Replacement fan and wiring question

**URL:** https://forum.sovol3d.com/t/replacement-fan-and-wiring-question/9938
**Category:** Sovol SV06 Plus ACE
**Created:** [April 27, 2026, 9:24pm UTC](https://forum.sovol3d.com/t/replacement-fan-and-wiring-question/9938 "2026-04-27T21:24:21Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![1OPUS](https://avatars.discourse-cdn.com/v4/letter/1/2bfe46/32.png) [@1OPUS](https://forum.sovol3d.com/u/1OPUS)
#### Post date: [April 27, 2026, 9:24pm UTC](https://forum.sovol3d.com/t/replacement-fan-and-wiring-question/9938/1 "2026-04-27T21:24:21Z")

</div>

I am replacing the fans for a quieter experience, thanks to those who posted ideas. I have a 24v fan for the extruder but it only has 2 wires, while the connector has 4. Any way to fake out the machine to get this working or am I going to need to find a fan with the proper connector? TIA

---

<div class="post-metadata">

### Author: ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)
#### Post date: [April 28, 2026, 1:48am UTC](https://forum.sovol3d.com/t/replacement-fan-and-wiring-question/9938/2 "2026-04-28T01:48:12Z")

</div>

You can disable the tachometer function by editing printer.cfg.

```auto
[fan]
pin: extra_mcu:PB0 #FAN3
max_power: 1.0
tachometer_pin: extra_mcu:PA3
tachometer_ppr: 2
tachometer_poll_interval: 0.00125

[heater_fan hotend_fan]      
pin: extra_mcu:PA7 #FAN2
max_power: 1.0               
kick_start_time: 0.5         
heater: extruder             
heater_temp: 45              
tachometer_pin: extra_mcu:PA2
tachometer_ppr: 2
tachometer_poll_interval: 0.0015

```

To

```auto
[fan]
pin: extra_mcu:PB0 #FAN3
max_power: 1.0
# tachometer_pin: extra_mcu:PA3
# tachometer_ppr: 2
# tachometer_poll_interval: 0.00125

[heater_fan hotend_fan]      
pin: extra_mcu:PA7 #FAN2
max_power: 1.0               
kick_start_time: 0.5         
heater: extruder             
heater_temp: 45              
# tachometer_pin: extra_mcu:PA2
# tachometer_ppr: 2
# tachometer_poll_interval: 0.0015

```

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/3/3c653174aa496bbc33fc0b71a622fb2a2d8fe5b8.jpeg)  
So a 2 wire fan goes [+] on PB0 OR PA7 and [-] on the GNG of the same plug.

You could also wire 24V and GNG for the heatsink and it would run 100% at all times.

---

<div class="post-metadata">

### Author: ![1OPUS](https://avatars.discourse-cdn.com/v4/letter/1/2bfe46/32.png) [@1OPUS](https://forum.sovol3d.com/u/1OPUS)
#### Post date: [April 28, 2026, 9:05am UTC](https://forum.sovol3d.com/t/replacement-fan-and-wiring-question/9938/3 "2026-04-28T09:05:47Z")

</div>

fantastic info, thanks so much! will give it a try