What is the fix for X440-24t Temperature Very Hot Warning Error

[Paul11]

What is the fix for X440-24t Temperature Very Hot Warning Error???

This is newly buy X440-24t and this temp err is happening. Please advice.

I saw a lot of post regarding this X440-24t temperature error.

I have upgraded to Recommended Release 15.6.3.1 patch1-5. Still encounter the issue.

Current State: OPERATIONALImage Selected: secondary
Image Booted: secondary
Primary ver: 15.3.1.4
Secondary ver: 15.6.3.1
patch1-5

10/22/2015 05:14:19.58 : Environment warning reported. Setting Environment LED color to Amber10/22/2015 05:14:19.58 : Switch: Temperature (69 C) is reaching maximum limit (70 Celsius). (X440-24t, P/N: 800471-00-14, S/N: 1519N-41648, Rev: 14.0)

* X440-24t.2 # sh temperature
Field Replaceable Units Temp (C) Status Min Normal Max
---------------------------------------------------------------------------
Switch : X440-24t 38.00 Normal -10 0-48 55
* X440-24t.3 #

[Prashanth_KG]

Looking at the temperature output, the room temperature seem to be on a higher value. Because, even with the fans running, X250e temperature is around 35 to 40.

Looking at the output of X440-24t, it looks like the fans are also working fine.

X440-24t.7 # sh fans
FanTray information:
State: Operational
NumFan: 2
Fan-1: Operational at 11000 RPM
Fan-2: Operational at 11000 RPM

* X440-24t.8 # sh temp
Field Replaceable Units Temp (C) Status Min Normal Max
---------------------------------------------------------------------------
Switch : X440-24t 45.50 Normal -10 0-48 55

This does not appear to be a hardware issue.
If there are no reboots of X440-24t switch, the warning that you notice could be expected considering the switch architecture and the temperature in the environment.

If there are reboots noticed, we may need to investigate this as it is not expected for the switch to get into the overheat condition if the fans are working.

Hope this helps!

[Prashanth_KG]

What is the different between switch temperature and the hotspot sensor?

Below is a behaviour in the X440-24t switch:
Switch operates on two sensors – one to trigger fans(sensor 0) and one to alarm s/w (hotspot sensor).

Fans will run only when switch temperature readings exceeds 48C

• Fans will start spinning when temperature sensor (0) reaches 48 degrees (as measured on sensor (0))
• Expected outcome: fans will run when the temp reaches 48 degrees and bring the temperature down.

However, in X250, fans are always rotating. So, it may be expected to see the temperature on the X440 switch to be slightly higher.
Also, the hotspot sensor is always higher than the temperature sensor.

[Prashanth_KG]

Hi Paul,

Did you experience any reboot of the X440 switch or are we seeing only the temperature warning? I am gathering information to your questions and will respond shortly.

[Prashanth_KG]

Watchdog is at the kernel level waiting to reset the switch in case of a SW/HW failure. Changing to watchdog reset mode is just an informational message that is logged prior to the reboot of the switch.

I got the similar log when I powered down and powered up the switch manually.

10/26/2015 07:44:14.75 EPM Started10/26/2015 07:44:14.74 Booting after System Failure.
10/26/2015 07:44:14.34 Changing to watchdog warm reset mode

Can you please clarify if you experienced any switch due to the overheat condition?

[Paul11]

Thanks for the fast response and reply. What is watchdog warm reset? 10/23/2015 00:39:21.93 : Booting after System Failure.10/23/2015 00:39:21.53 : Changing to watchdog warm reset mode