Fan Module Overview
Depending on the switch model, three or five internal hot-swappable are available. A powered switch should always have more than one operational fan. The switch can operate with two operational fans and one nonfunctional fan, but the failed fan should be replaced as soon as possible to avoid a service interruption due to a second fan fault.

1 |
Fan LED |
3 |
Retainer clip |
2 |
Exhaust vent |
4 |
Extraction handles |
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The WS-C3850 switches require three fans for proper cooling. |

1 |
Fan assembly levers |
3 |
Fan status LED (red/green) |
2 |
Fans |
4 |
Fan assembly retention latch |
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Ensure that the power supplies are inserted correctly to match the corresponding fans. Power supplies with blue handles correspond to fans with blue handles, and power supplies with red handles correspond to fans with red handles. |
![]() Note |
The WS-C3850-48XS switches require five fans for proper cooling. |