I have the same problem,but we've had changes in our physical environment. The servers, switches, and our desks were originally in one room with a Mr. Slim A/C on the desk side of the room and the stack of EX4200s and EX4500s usually kept quiet, but would rev up every now and then on warmer days. Then we virtualized; added a large SAN and blade servers, divided the room in half with a wall, and added a large Liebert A/C that maintains 70*F in the room with excellent circulation. But, due to lack of planning , we had to orient the SAN and blades so they were blowing hot air in to the switches, and logically the fans started running at full speed.
Now we've rearranged everything and there is no hot air blowing in the switches, but fan #1 in each of the 4200s (units 0-3) continues to run at full speed. I don't get it....
We're running 12.3R9-S1
Here's the data:
Class Item Status Measurement
Power FPC 0 Power Supply 0 OK
FPC 0 Power Supply 1 Absent
FPC 1 Power Supply 0 OK
FPC 1 Power Supply 1 Absent
FPC 2 Power Supply 0 OK
FPC 2 Power Supply 1 Absent
FPC 3 Power Supply 0 OK
FPC 3 Power Supply 1 Absent
FPC 4 Power Supply 0 OK
FPC 4 Power Supply 0 Airflow OK Front to back
FPC 4 Power Supply 1 OK
FPC 4 Power Supply 1 Airflow OK Front to back
FPC 5 Power Supply 0 OK
FPC 5 Power Supply 0 Airflow OK Front to back
FPC 5 Power Supply 1 OK
FPC 5 Power Supply 1 Airflow OK Front to back
Temp FPC 0 CPU OK 30 degrees C / 86 degrees F
FPC 0 EX-PFE1 OK 43 degrees C / 109 degrees F
FPC 0 EX-PFE2 OK 59 degrees C / 138 degrees F
FPC 0 EX-PFE3 OK 42 degrees C / 107 degrees F
FPC 0 GEPHY Front Left OK 28 degrees C / 82 degrees F
FPC 0 GEPHY Front Middle OK 33 degrees C / 91 degrees F
FPC 0 GEPHY Front Right OK 32 degrees C / 89 degrees F
FPC 0 Uplink Conn OK 29 degrees C / 84 degrees F
FPC 1 CPU OK 27 degrees C / 80 degrees F
FPC 1 EX-PFE1 OK 41 degrees C / 105 degrees F
FPC 1 EX-PFE2 OK 56 degrees C / 132 degrees F
FPC 1 EX-PFE3 OK 42 degrees C / 107 degrees F
FPC 1 GEPHY Front Left OK 31 degrees C / 87 degrees F
FPC 1 GEPHY Front Middle OK 40 degrees C / 104 degrees F
FPC 1 GEPHY Front Right OK 36 degrees C / 96 degrees F
FPC 1 Uplink Conn OK 32 degrees C / 89 degrees F
FPC 2 CPU OK 32 degrees C / 89 degrees F
FPC 2 EX-PFE1 OK 42 degrees C / 107 degrees F
FPC 2 EX-PFE2 OK 60 degrees C / 140 degrees F
FPC 2 EX-PFE3 OK 45 degrees C / 113 degrees F
FPC 2 GEPHY Front Left OK 30 degrees C / 86 degrees F
FPC 2 GEPHY Front Middle OK 35 degrees C / 95 degrees F
FPC 2 GEPHY Front Right OK 29 degrees C / 84 degrees F
FPC 2 Uplink Conn OK 30 degrees C / 86 degrees F
FPC 3 CPU OK 35 degrees C / 95 degrees F
FPC 3 EX-PFE1 OK 46 degrees C / 114 degrees F
FPC 3 EX-PFE2 OK 57 degrees C / 134 degrees F
FPC 3 EX-PFE3 OK 45 degrees C / 113 degrees F
FPC 3 GEPHY Front Left OK 24 degrees C / 75 degrees F
FPC 3 GEPHY Front Middle OK 28 degrees C / 82 degrees F
FPC 3 GEPHY Front Right OK 30 degrees C / 86 degrees F
FPC 3 Uplink Conn OK 30 degrees C / 86 degrees F
FPC 4 Rear Left PCB OK 42 degrees C / 107 degrees F
FPC 4 Rear Middle PCB OK 48 degrees C / 118 degrees F
FPC 4 Rear Right PCB OK 48 degrees C / 118 degrees F
FPC 4 PHY0 OK 30 degrees C / 86 degrees F
FPC 4 PHY6 OK 32 degrees C / 89 degrees F
FPC 4 PHY12 OK 31 degrees C / 87 degrees F
FPC 4 PHY19 OK 30 degrees C / 86 degrees F
FPC 5 Rear Left PCB OK 43 degrees C / 109 degrees F
FPC 5 Rear Middle PCB OK 46 degrees C / 114 degrees F
FPC 5 Rear Right PCB OK 46 degrees C / 114 degrees F
FPC 5 PHY0 OK 31 degrees C / 87 degrees F
FPC 5 PHY6 OK 32 degrees C / 89 degrees F
FPC 5 PHY12 OK 31 degrees C / 87 degrees F
FPC 5 PHY19 OK 32 degrees C / 89 degrees F
Fans FPC 0 Fan 1 OK Spinning at full speed
FPC 0 Fan 2 OK Spinning at normal speed
FPC 0 Fan 3 OK Spinning at normal speed
FPC 1 Fan 1 OK Spinning at full speed
FPC 1 Fan 2 OK Spinning at normal speed
FPC 1 Fan 3 OK Spinning at normal speed
FPC 2 Fan 1 OK Spinning at full speed
FPC 2 Fan 2 OK Spinning at normal speed
FPC 2 Fan 3 OK Spinning at normal speed
FPC 3 Fan 1 OK Spinning at full speed
FPC 3 Fan 2 OK Spinning at normal speed
FPC 3 Fan 3 OK Spinning at normal speed
FPC 4 Fan 1 OK Spinning at normal speed
FPC 4 Fan 2 OK Spinning at normal speed
FPC 4 Fan 3 OK Spinning at normal speed
FPC 4 Fan 4 OK Spinning at normal speed
FPC 4 Fan 5 OK Spinning at normal speed
FPC 4 Fan-Tray Airflow OK Front to back
FPC 5 Fan 1 OK Spinning at normal speed
FPC 5 Fan 2 OK Spinning at normal speed
FPC 5 Fan 3 OK Spinning at normal speed
FPC 5 Fan 4 OK Spinning at normal speed
FPC 5 Fan 5 OK Spinning at normal speed
FPC 5 Fan-Tray Airflow OK Front to back