Fan speed on a Cisco 4400 series ISR

[IrishAdmin]

We just installed a Cisco 4431 router in our Jackson location which is at 6300' altitude.  I am wondering why the fan speeds are running close to 18,000 rpm.  The inlet temperature is 27 and 31 Celsius for the Inlet 1 and Inlet 2.  Shouldn't they slow to a lesser speed?

[Reza Sharifi]

18000 is a little high.  I see them running at:

RPM: fan0 P1 Normal 4288 RPM
RPM: fan0 P2 Normal 9390 RPM
RPM: fan1 P2 Normal 9532 RPM
RPM: fan2 P2 Normal 9360 RPM

It maybe that the room temperature is a little too high and you may want to adjust it and run the "sh env all" again. Also, sometime Cisco device start with high RPMs and than they adjust after a few hours.

HTH

[IrishAdmin]

It has been powered on and running for 14 hours and still has not adjusted.  Is there something else I can check?  The room temp is 76 degrees Fahrenheit.

[Reza Sharifi]

76 is distantly too high. Can you adjust it to 70 or 72 and watch the rpms again?