That alarm is available on the more decent models. There are also stickers for inside your fridge that can indicate the temperature. There is also a variant fo

That alarm is available on the more decent models. There are also stickers for inside your fridge that can indicate the temperature. There is also a variant for specific temperatures, like 0, 5 or 7 degrees, that colorize if the temperature has risen, giving a (non-reversible) indication your fridge has been too warm. Edit: Did a quick search for you: https://www.tiptemp.com/Products/Rising-Time-Temperature-Indicating-Labels/ https://www.tiptemp.com/Products/Rising-Time-Temperature-Ind...