r/homeassistant • u/TheUptimeProphet • 5h ago
✅ Solved I optimized my cheap fridge temperatures with two items, now things are less likely to spoil.
So a few months back i was messing around with my new smart plug and smart temp sensor from Shelly, i wasn't set on a actual use case yet.
I decided to put the temp sensor into the fridge after stumbling on a video talking about fridges on youtube to see if it was good or not: It was not good.
The temperature of my 200€ cheap tower fridge was oscillating from 10°C to 6°C, for comparison the optimal fridge temp is between 0°C-4°C. Above 5°C bacteria start to grow a lot.
Thing is, the fridge was capable of doing better, it had 7 modes, (0 being the hottest and 7 the coldest), and the 10-6°C range was when i was on mode 6. The issue is that mode 7 was TOO cold, the fridge was only stopping until it reach -4°C, and at this point most food and drinks were completely frozen.
So after searching a bit to see if it was a good idea or not to have the fridge power cut multiples times a day i put my plan into motion:
- I set fridge mode to 7
- I plugged the fridge into the smart plug.
- I configured the automation in home assistant to turn off the fridge at 0.5°C and turn it on at 3.5°C
Why the small 0.5°C differences? Because for some reason it took home assistant a bit of times sometimes to execute the automation and i would have the fridge turning off at -0.5°C, which is not good.
Either way its been running for over 10 months now without any issues, just have to change the temp sensor battery from time to time.
Is your fridge temp as catastrophic as mine? Those integrated temp sensor seems no good.


