I've got a few network switches running rather hot. The switches have an average internal temperature of 63°C. I'm aware that this is too hot for a network switches and we are pushing upper management for air con. My question is this, what temperature would you expect to see a switch running at whilst running under load? What would you argue is best practice when it comes to internal switch temperatures? If it helps the switch models are Dell N4032.


1 Answer 1


It depends on your device, if temperature is high, fans will spin faster and you reduce timelife of your switch.

I think 63°C is slightly high but I have switches working at this temperature (or greater) with no problems.

If you need a number, according N4000 manual, front led is triggered when "The thermal sensor’s system temperature threshold of 75°C has been exceeded." So, you are reaching limit but you still have a security margin.

  • Hi KorXo. Thanks for your reply. Interesting to hear that you have switches running at that temperature and above. I touched the outer casing on them this morning and I could have fried an egg on them! It looks like we have no major worries until the LED comes on.
    – user23673
    Commented Jul 19, 2016 at 10:21
  • Anyway, you should try to cool down this devices by separating devices, check correct cabling, improve refrigeration, etc. My first sentence should be: lower temperature, better performance and durability. In summary, try to cool down. If you can't, don't worry much about it.
    – KorXo
    Commented Jul 19, 2016 at 10:27
  • Agreed. Unfortunately I'm in the situation where upper management believe it's not hot enough to justify the expense of having air con installed. The team I work in are trying to prove the case for air con. We have set a data logger up collecting temperature and humidity levels up.
    – user23673
    Commented Jul 19, 2016 at 10:31

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