Verifying an Impeller Failure

Action

To verify an impeller failure, follow these steps:

1. Place your hand near the exhaust in the router chassis to determine whether the impellers are pushing air out. If you do not feel much air or no air at all, the impeller is not working.
2. If the impeller fails, replace it as described in the appropriate hardware guide. The impellers 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.