hi john,these three way fridge's work off heat,so when you have it on the gas feed you have a flame & when you have it on 240 volt or 12 volts these are heater element's(different voltage element's)all the three ways of these take a fair few hour's to work the quickest is the gas instant heat but still take's a very long time to work,i think myself you have to have these turned on at least 24 hour's before some thing will start to chill but once up & running they are very good little fridge's.hope you understand this & best of luck
GHOST, July 2010