I had some temperature spikes in the data center recently that caused havoc and for some reason I never received notifications. I guess this isn’t configured to email by default, rather it sends a trap.
To change this behavior so that I can get escalating notifications when temperature dramatically spikes, you can modify it to do so.
Go to the Alarms for the vCenter server root domain and double-click on Host Hardware Temperature Status:
In the settings for this, you want to change the action (click on Action tab) to send email notification. I send to my email as well as SMS:
You can always check out what the temperature is of your ESX host by going to the ESX host in vCenter and clicking on Hardware Status tab and expanding Front Panel Board Ambient Temp (or similar depending on your hardware):
Set Ambient Temperature Alarm VMware ESX Host
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