Review on 🌡️ Inkbird ITC-100VH Digital PID Thermostat Temperature Controller - AC 100-220V, 40DA SSR, White Heat Sink, K Thermocouple: A Comprehensive Review by Frank Garahana

I set them up with ice water and changed the temperature according to the set temperature with two other thermometers, then I did it on the hot side and they weren't very consistent but I I changed them again as I use them to heat soups and keep them warm. Had to play around with manual automatics and no manual but not sure I have them, I set 36C and it goes up to 40C. Eventually I set them up, they haven't been for about a month used and a half when i ran them the calibrations were off again so do they need a power supply every few weeks? Also, they are in my garage, will the temperature affect them?