Well it looked like a sure winner given the circumstances. Guess I will just hold forever - to the moon or to the dirt.. riding it out

I recently had a fan go out on my AntMiner S4.  Upon reading the following article, I ordered Delta PFC1212DE fans as a replacement.

https://bitmain.zendesk.com/hc/en-us/articles/204199879-Antminer-S4-fan-specification-and-possible-replacement-fans

I replaced the front and back fans, closest to the PSU.

The colour of the wires were not the same on the old and new fans.  They both had red, black, and blue which I connected together.  The 4th wire on the old fan is white which I connected to a yellow wire on the new fan.

Now when I turn the S4 on, the old fans power up as normal, but the new fans only come on for a few seconds and then shut off.

The S4 will run for a while before stutting down due to overheating.

Any suggestions would be appreciated.

Tom Travis

First make sure you are out of your warranty as replacing fan violates it. (Warranty is 90 day's so it's a good chance yours is out of warranty). Then look at Bitmain suggestions on fan's - https://bitmain.zendesk.com/hc/en-us/articles/204199879-Antminer-S4-fan-specification-and-possible-replacement-fans

I personally chose the Sanyo Denki SunAce 120 9GV1212P1J091

Stats from Bitmain:

Dimension: 120*120*38mm
Voltage: 12V
Power consumption: 6400RPM 36W
Rated current: DutyCycle 100% @ 3A
Air Flow: 6400RPM @ 224CFM
Noise: 6400RPM @ 64 dB-A
Air Pressure: 6400RPM 36.82 MM-H2O
Life Expectancy: 40000 hrs @ 40°C
Connector: 2510-4P

Install:
You will unscrew the 6 screws holding on the top of the case.  Also unscrew the fan metal guard with 4 screws this will release old fan.   You can unplug the old fan from the board.


The new fan:
One thing I ran into was the new fan had a plastic piece for allowing it to set up on a three pin fan assembly easy.  I used a file and pocket knife to remove the 3 pin plastic.  This allowed me to put it in the 4 pin slot on board without pushing the plastic far away from plug.   Also mine was a close fan to the board. If your fan is far away you might need to make the power cord longer for the fan.




Comparing old and new fan:


Gallery: http://s100.photobucket.com/user/notlist3d/slideshow/S4%20Fan%20Replacement?sort=3


And of course the end result:

Here is what the stats look like with the sanyo fan. It is circled in red you will see it does have a higher RPM.  I think for the money was good deal.  Cheaper then Delta and faster then delta.  Now I will watch it over time to see if it lasts good.