Resolved Full speed of the FRONT FAN after BCM94360CD (BT+WiFi) Module upgrade

[Mic-M4c]

Hi all !
Today I've proceeded to the long awaited upgrade of the WiFi and BT in my Mac Pro5,1 (mid 2010) Monoprocessor 6-core @3,33GHz SDRAM 48GB@1333MHz Radeon RX 560 4Go

> I've replaced the original WiFi by this one : BCM94360CD

> I have fully disconnected (USB alim and antenna) the original BT module, let in it's place :

> the 4 antennas have been correctly connected to the new WiFi+BT module

and everything works fine in Monterey 12.3 (with OpenCore)

EXCEPT ONE BIG THING : the FRONT FAN (and only him) runs at full speed fews seconds after I've pressed the Power Button and never stops

I tried to :
– reset NVRAM/PRAM > no effect
– same problem under Mojave, Catalina, Big Sur, Monterey but WiFi and BT work fine under all these macOS.

I checked with Macs Fan Control and I see that :

No way to manually change the fan speed.

I need you help please, to fix this front fan problem.

Thank you all in advance.
Guillaume

 

[arw]

You probably just poked the fan connecter a bit or applied too much pull on the cable and now the connector isn‘t seated properly anymore.
Disconnect it completely, clean it, reconnect it.
It‘s the 4-pin plug right next to the WiFi/BT module.

 

[Mic-M4c]

@arw
Hi and thank you for your suggestion. I will proceed tomorrow and write here the results. Thank you.
Any other advices ?

 

[Mic-M4c]

@arw :
You meant the 4-pin plug to the left side of the original Bluetooth module ? (second picture)

 

[Mic-M4c]

You were right : it was the 4-pin plug right next to the WiFi/BT module.

Everything is fine and silent now ! ??

 

[Mic-M4c]

Perfect install with OpenCore Legacy Patcher (Monterey 12.3 patched) :