Elusive Pump Operations


I have been unable to identify a “pump” that was detected several weeks ago.
The power meter for the past 24 hours shows it cycling on and off rapidly about 20 times (sorry but the system restricted me to only one image).

Here is the waveform:

I have determined this is not the sump pump, the condensate pump, the washing machine, or the (gas) hot water heater exhaust fan but I have been unable to figure it out. Notice that it runs only for a few seconds, so it is difficult to track it down after I receive the notification.

I will appreciate any ideas you may have on what this is or how I can better identify it.



Welcome @lee
How many watts does it use and how often does it run?
You said rapidly cycles but I can’t see the time, sorry.


It draws 123 watts.
It was on 19 times in 24 hours. The power meter for the past 24 is now shown below.


Appears to run more during the day. The short cycle times look to be just a few minutes, I wonder if could be ice maker motor on refrigerator.


Thanks for this suggestion.
To check it out I raised the ice-maker bale to turn it off around 3 pm yesterday.
Since then Sense reported several operations of the device, so it seems unlikely this is the ice-maker.

Coincidentally, at almost exactly the same time, Sense reported that it found a new device that it suggests naming “ice-maker”. I tentatively took that suggestion and allowed the ice-maker to resume operating. I’ll track the new device and continue to investigate the mystery “pump” device.