A fridge operating at too higher temperature can result in food being spoilt or providing the right conditions for the growth of bacteria that can cause food poisoning. Too low and it will be using more electricity than is necessary.

This simple spirit thermometer is suitable for either the fridge or freezer. The clear scale is in °C (in 2°C increments) and has marked zones for recommended fridge and freezer temperatures, making it easy to see at a glance whether the appliance is keeping food at safe temperatures.