Aurora R13, replacement Noctua NF-A12x25 PWM fan failure

Question

HiToday I've replaced two of my fans (Top and lower-front) on my Aurora R13 with noctua NF-A12x25 PWMWhen booting up the system there's an error message telling me that both of those fans have failed to work. Error code is 2000-0511 when running quick diagnostics and when running dell supportassist error is Fans - Functional Tests - D0501.Also lower-front fan is working properly and just isn't seen by the system while top one is spinning for like few seconds when booting up and then just stops spinning completely.Should I just replace them back while I still can return them or is it there a fix to it.

ProfessorW00d · Accepted Answer

The top fan stopping is a problem; make sure it is properly connected to the motherboard header. The errors result because the Noctua fans do not meet the Dell diagnostics ramp-up criteria. One work around is to connect an OEM fan and a Noctua fan with a PWM Y-splitter cable, making sure the Dell OEM fan is connected to the 4-pin side of the PWM Y-splitter. You would need to do this for each Noctua fan, or use a PWM 3-way splitter cable. Another thing you can try is to hold down the ESC key when you power-up, to hopefully skip the startup diagnostic test.

Mik0l4j · Answer

@ProfessorW00d​ Okay I've decided to replace new fans with my old one and there's next issue. My Aurora has 4 fans in total: Cpu fan, top fan and two front ones. Despite that everytime I boot up my system I get error about rear fan failure, every other fan works perfectly and despite having 4, my system checks those 4 + rear fan.Is there a fix to that?

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