HATs and other add-ons • Re: Active Cooler fan running at maximum speed all the time.

Check the 4 pin fan connector, any bent pins ?

Are you using the RaspiOS ?

Well, now you mention it I've looked and there is a bent pin!

I'll have to wait for better light in the morning, but I hope this is the answer.

Thanks very much for your help!

Statistics: Posted by Thraegwaster — Thu Jan 22, 2026 10:11 pm