I have a glass fronted shop display fridge that I use for nice cold beers on days like today.
A couple of years ago the thermostat failed and the fridge ran 24/7 resulting in it icing up at the back. Tim Watts suggested I use a plug in timer to get the fridge to run 5 minutes every 15 minutes and increase or decrease the on times according to the outside temperature/seasons.
Well that worked brilliantly until last night. The gf compained the beers were not cold enough and removed the timer and just plugged the fridge into the socket as she believed "If it runs all the time they will be really cold". I now have a fridge that is warm on the inside and ice cold on the outside.