Zywall USG 20 fan operating logic

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Cesare2
Cesare2 Posts: 2
First Comment
edited June 5 in USG FLEX H Series

Hi, I'm from Italy, excuse for my English…I have found 2 old Zywall USG20 (firmware update to last release) that everyone has the fan which start ad stop in loop every time.

It's a normal operation?

Thanks you for the attention and best regards.

Cesare

Accepted Solution

  • Wojtek
    Wojtek Posts: 17  Freshman Member
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    When the temperature of the device exceeds the limit temperature, the fans will turn on.
    When the fans cool the device below the limit temperature - they will turn off.
    In my USG210 it is like this: https://community.zyxel.com/en/discussion/1181/usg210-temperature

    Regards
    Wojtek

All Replies

  • Wojtek
    Wojtek Posts: 17  Freshman Member
    First Anniversary 10 Comments First Answer
    Answer ✓
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    When the temperature of the device exceeds the limit temperature, the fans will turn on.
    When the fans cool the device below the limit temperature - they will turn off.
    In my USG210 it is like this: https://community.zyxel.com/en/discussion/1181/usg210-temperature

    Regards
    Wojtek

  • Cesare2
    Cesare2 Posts: 2
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    edited June 6
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    Thank you for the answer.

    My firewall is EOS, therefore isn't safe?

    Thanks you for the attention and best regards.

    Cesare

  • Zyxel_James
    Zyxel_James Posts: 660  Zyxel Employee
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    @Cesare2 You can check the hardware temperature by debug hardware fan-get

    The safe value should be under 70°C

  • mMontana
    mMontana Posts: 1,351  Guru Member
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    Current days are "normally hot" in italy. USG20 is a really old device, therefore maybe the thermal media between heatshink and cpu is closer to destroyed than in service.

    Consider a thermal media replacement, if you know how to do it.