PWM Fan starts and stops

[emcatbagan]

Hi all,

Has anyone encountered the same scenario as mine? 140mm case fan starts spinning upon boot then stops after a few seconds.
- QFAN control set at 100%
- All fan headers are PWM, rated at 12v max 1A each.
Both fans (up and down) are connected via splitter, previously worked as intended (full speed) but I noticed this behavior only after a few days. Already tried the following:
X swapped the splitter locations

X connected the fan alone via splitter

X connected the fan directly to the mobo fan header

X connected the fan to another fan header

X set fan speed to 100% via Argus Monitor

? Tried optimizing all fans via the BIOS control, once the bios reaches this particular fan, it starts spinning for the "test" but then stops again after the optimization
? Once got stuck on a startup error, the fan spun continuously until I reached the loading screen

 

Noctua NF-A14 Chromaxx fan, ASUS TUF X570 Wifi Mobo, 700W PSU, all other fans are spinning as intended. Only this particular fan behaves like this.
 

[1van]

Noctua fans can stop even if controlled via PWM, the lowest setting depend on a model and on a particular fan.

Does it stop if connected to a 3-pin connector (DC-control)?

[emcatbagan]

34 minutes ago, 1van said:

Noctua fans can stop even if controlled via PWM, the lowest setting depend on a model and on a particular fan.

Does it stop if connected to a 3-pin connector (DC-control)?

Mobo doesn't have any 3-pin fan header, MOBO has settings that can change 4-pin pwm to DC but it doesn't help. What's weirder is top and bottom fans are the same model.

[1van]

1 hour ago, emcatbagan said:

 

If you really think you'd tried everything and it didn't help, contact Noctua's support, they will help.

[emcatbagan]

6 hours ago, 1van said:

If you really think you'd tried everything and it didn't help, contact Noctua's support, they will help.

Thanks! Appreciate the advice. Already sent them a ticket while waiting for any leads.