Question H100i PRO liquid cooling fan problem

Sep 23, 2018
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I have a fan has 0 Rpm reading which put a lot of burden on my other fan and pump. Can you guys suggest any fix?
 

rubix_1011

Contributing Writer
Moderator
Sounds like either the fan curve is set incorrectly so that fan does not stay in a running state, or there is an issue with the fan. Are the fans running from a splitter (1 wire that controls 2 fans?) or are they defined separately? If separately, if you swap the fan control wires, does the other fan then work in a limited capacity like the original, or does it work correctly at all times and how does the currently 'broken' fan work?
 
Sep 23, 2018
10
0
10
0
Sounds like either the fan curve is set incorrectly so that fan does not stay in a running state, or there is an issue with the fan. Are the fans running from a splitter (1 wire that controls 2 fans?) or are they defined separately? If separately, if you swap the fan control wires, does the other fan then work in a limited capacity like the original, or does it work correctly at all times and how does the currently 'broken' fan work?
It works fine today. I guess there is something prevent it to spin. I somehow use the pen to remove that thing.
 

rubix_1011

Contributing Writer
Moderator
If a PWM curve is too low for some fans, they don't come out of the low RPM/power state very well and can stall. Most fans draw a bit more power at initial startup to get them moving, initially and some controllers might not provide a consistent signal when a fan needs to go from 0% in order to ramp up to a low speed, like 30%.

This has been my observation; some fans are much better at handling lower PWM speeds than others. I have seen it regularly in testing CPU coolers.
 

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