Interesting to me as im just since September with Reefers on the Milk. If i hook a Trailer up is Temp preset to 2 centigrates. fridge runs and Temp is between +1 and +5 i go,otherwise i phone Office and take another Trailer. Had one last Night which was off. Started them and all OK. When i left Yard was Fridge off and +7 Centigrades. Didnt start,so i switched them off and on again and everything OK till it went off by +2 and didnt came on. Switched to continuous running and all was OK. Not sure,but think the Temp-Sensor wasnt able to start the Fridge. Got said often is a sensor getting icy and then dont works. But wots with that Sensor when i carry Ice by -25 Centigrates as Frozzen?