Kauf Plug PLF12 Quit Working This Morning

[PKCubed]

I had a Kauf Plug monitoring power you my server rack UPS. It had been measuring about 10 amps for days with no problems. This morning it shut off and my UPS went in to battery mode. After further investigation, plugging it in results in the following symptoms.

• The red light will flash shortly, sometimes it will stay on.
• The plug makes strange buzzing noises (frequency seems to changes when I touch it)
• No WIFI, no functionality at all, no power through the plug.

My best guess is that the power supply inside the plug supplying the ESP module, relay, and LEDs failed and isn't supplying sufficient power to the plug. From my experience, power supplies make bad noises when they fail.

Could this be a result of a high current load through the plug for a long period of time (10 amps in my case)? Or is this just a bad plug?