Bitcoin Forum

hi im having problem with my antminer S9
one of the fans is running realy low and its making my miner go to temps above 88 grades

heres a pic
https://s24.postimg.org/5nyr76jjn/Untitled.jpg

this miner been running for like 2 months and no problems

both fans turns on but one is realy slow

You'll probably have to replace it or find a way to repair it. Looks like a physical issue on the fan itself.

Either the fan itself is seizing up or its already dead and being spun by the front fan. Replace the fan and you should be good to go. Make sure your replacement fan can spin at least 4500 rpm, the firmware doesnt like anything under that.

so its a normal behaviour for a diying fan ?
it goes from 1680 to 3700 rpm.. it was working at like 4500 without droping..

EDIT: after cleaning it it works now.. but now the other one is slower.. wtf

You sould periodically clean your miners as dust builds up and coats the heatsinks and fns as youve found out. Switch it off and clean everything and see how you get on.

i did it.. but one of the fan is still slow.. its stuck on 1800rpm and wont increase

so buy a replacement fan


this one is okay
https://bitmainwarranty.com/shop/products/us/fan_s7/

this is good

https://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00QWB1X3O/ref=sr_1_1?


I had a case of these,but all gone

https://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00YOC80IO/ref=sr_1_2?

but its weird that front fan was running slow now is the back one that is running slow and the front one is now running at normal speed..

Have you plugged them in the right way around? Im guessing when you cleaned them you have plugged the fans back in different connectors on the controlboard

yeah they are connected in the right place. im still getting 1440/1800 rpm on "fan 3" thats front fan right?

Try to oil the fan if that didn't work you should replace it.

u know if "fan 3" is back or front fan?

normally fan 1 is up front where the controllers ethernet jack is and fan 3 is on the back side