CRS326-24S+2Q+RM - FAN3 broken?

SwOS
1

Hi,

My brand new CRS326-24S+2Q+RM (SwOS 2.11) shows reasonable values for FAN1 and FAN2 (around 5600 RPM, CPU at 56C). However, FAN 3 stays at 0 RPM. Is that fan broken or is there a temperature control that only spins up this fan when it get’s really hot?

Cheers

2

I contacted MikroTik’s support about this and they suggested opening the switch’s case. When the case was open I found that there are actually 4 fan connectors on the switch’s mainboard even though there are only 3 fans. The third fan was connected to the connector labeled FAN4. The FAN3 connector was empty. Probably during the assembly process of the switch in the factory someone has mistakenly attached the third fan to the FAN4 connector. After changing that back to how it’s supposed, everything is working as expected now.

Cheers

3

2026 and I bought a brand new CRS326-24S+2Q+ from syscom in Mexico and had the same issue, fortunately I saw your post and was just open the switch and change the connection from FAN4 to FAN3.