A few years ago we had the Polar Vortex extend its cold reach farther south than anyone could remember in recent times. ATL if I remember correctly reported temperatures below zero, with frost bite warnings being issued for rampers. As luck would have it, we got a tow-over aircraft from the hangar that met the very definition of cold soaked. All the Big water bottles and everything liquid in the galley were frozen rock solid and to top it off no APU and an abysmal conditioned air connection that was blowing cold air even in its warm setting. Starting one then boarding was not an option; first time I saw a jet refused for being too cold.