Unknown Heating Device


#1

I’ve had this Heating Device detected by Sense for a couple of months and I can’t figure out what it is…It seems to run for about 20 minutes at a consistent 660 watts. I thought it might be my dishwasher, but I turned it off mid cycle and it stayed on according to Sense, so I don’t think that’s it.


#2

Got a picture of the profile?


#3

Sure. I am starting to think it is my dishwasher. Is it possible if I powered it off though (even at the breaker) is it possible it’s actually still drawing power?
I was wrong, it ran on Monday for almost 2 hours.


#4

Doesn’t sound much like a dishwasher, and if you shut the breaker off it shouldn’t be drawing any power :slight_smile:

Can you scale it out a bunch so we can see the entire wave form?

What worries me about flatlines like that is that Sense occasionally sees a real device turn on, but doesn’t accurately detect when it shuts off - and you get a long standing flat line like you see there. I’ve seen it with my fridge and a CFL tube light.


#5

Thanks. Not much to See as it’s a flat 660 watts the entire time…


#6

Ooh - gotcha. So in my limited experience, most heating elements (dishwasher, dryer, stove burners) have a profile like this:

If yours is consistently a flat line when it comes on, and goes for an hour or more, my guess would be a false detection, or a cluster of incandescent lights. Do you have a group of lights (6-10) that come on in unison?

My laundry light isn’t detected every time it comes on, which made it hard to track down, but I noticed it only came on during the day and was on for a minute at a time… Our laundry light is on a 1min timer, but it still took me a while to identify :slight_smile:


#7

Here’s a picture of my fridge flatlining after failing to detect a shutoff:

And here’s a picture of the laundry room light getting hung up:


#8

Thanks. The difference with mine is, it always stays at 660 and never moves. I don’t believe it’s any series of lights.


#9

How often does it come on?


#10

Not often. This week, twice on Monday and Wednesday but before that it was a good 8 days or so. Sense might still be learning about it.


#11

The defroster element in my fridge’s freezer compartment comes on usually twice a day and uses an average of 244 watts. The average runtime is 11 minutes 53 seconds. Mine is only a 10.5 cu. ft. fridge so I could see a larger one drawing more power and/or running longer. Trace below.


#12

I’ve noticed this kicks on when I go to charge my Tesla Model S every once in awhile which charges on a dedicated circuit that use a NE14-50 plug. However, when I stop charging the car, it doesn’t stop the device in Sense from showing power. I am not sure what this means, but figured I would mention it.


#13

I have notice curling irons, and other hair irons etc show up as heat. See if this helps as each of my girls have their own and each shows up differently


#14

Just to add my $.05 worth, the ice maker on my fridge was detected as “unknown heater”. took me a while to figure it out but maybe worth looking at as well although 660 Watts may be a bit much for an ice maker but my point is, don’t only look at heating elements.


#15

Thanks. I ruled out the ice maker already. It seems to come on a lot when my Tesla is charging.


closed #16