I put the Ikea Thread sensor in my fridge a while back and it's been a lot more useful than I expected. My fridge had been periodically getting too cold or too hot, I suspect the issue is that the captive touch buttons that control the temp get occasionally bumped, changing the set temperature. With the thread sensor I can have Home Assistant send me an alert when the fridge leaves the safe zone for too long so I can manually correct it.

It's also been interesting to see when placing hot food in the fridge how long the temperature stays elevated for. I put the sensor in a ziplock bag and sucked the air out of it so it has weatherproofing.

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askvictor 2 hours ago | parent | next [-]

And it communicates OK to outside the fridge? I would have thought a fridge is pretty close to a Faraday cage

	▲	Gigachad 2 hours ago \| parent [-]
		Yeah I thought this might be an issue but it's been running flawless for months without ever dropping out.

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tacomagick 2 hours ago | parent | prev [-]

Did you make sure those hot peaks are not your fridge's defrost cycle?

	▲	Gigachad 2 hours ago \| parent [-]
		What would normally happen is I’d start seeing things freeze so I’d adjust it hotter until one time some things went mouldy sooner than I’d expect so I put the sensor in the fridge to get a better idea what is going on. Seeing the data, the fridge seems to once every couple months just move to a colder temp and stay there until I adjust it back again which is why I think it’s just the button getting bumped. Being able to see the fridge temp to a tenth of a degree and getting alerted when it’s wrong has been much more useful than I expected. The safe fridge temp is a fairly narrow band that’s basically impossible to hit without a proper temp sensor.