Device comes on every 4 days; cycles on/off 3-5 times over 20 mins; Sense suggests it’s a heat source. Any ideas?
How often does someone in your family blow-dry their hair ?
Best if you can post a snapshot of that 20 min period so we can see shape, wattage, etc.
Possibly defrost cycle on a refrigerator or chest freezer.
The waveform perfectly fits a resistive load (sudden spike with a slight drop off as the element heats up), so yes, it’s almost certainly actually heat related as Sense is suggesting.
Yes. agree. I checked back several weeks - its exactly the same waveform, 8 cycles over about 35 mins, every 4 days. i thought maybe a charger system I have on a parked car for winter - but not able to trigger it.
Certainly sounds like something on a timer. A burst of exactly the same cycles every four days isn’t likely to be due to human or weather triggers.
found it - defrost for spare refrigerator,
Oops, sorry @oshawapilot I posted wrong oerson
@oshawapilot nailed it…