Verifying a Fan Failure

Action

To verify a fan failure, follow these steps:

1. Perform a swap test on the fan. Remove the problem fan tray and put it into another bay. If the fan tray does not work in the other bay, it is probably faulty and must be replaced. If the fan tray works in another bay, there is probably a problem with the power connectivity from the midplane.
2. Check the fan power connector.
3. Check the fan connector on the router midplane.
4. If the fan fails, replace it as described in the appropriate hardware guide. The fans are hot-removable and hot-insertable. You can replace the fans without powering down the router.
   

   NOTE: The cooling system components (fans and impellers) do not have serial numbers. Therefore, you will not see a serial number listed in the hardware inventory or a serial number ID label on the component.