Yes you can, but there are some significant downsides to using a home fridge in a caravan. As you can imagine, household fridges are designed and built to be operated on a stable and level floor, with a large amount of ventilation on the sides, rear and above. They also require a steady supply of 240V AC power. These are three things you will generally not find in a caravan.
Normal household fridges can be very noisy. Whilst a 240V fridge may have extra bells and whistles, like reverse cycle, frost free, and individual fridge and freezer temperatures, these functions produce more noise. And when you are sleeping in close proximity to your fridge, you really want the quietest fridge you can find. In comparison, high quality 12V compressor fridges are quieter.
Most household fridges are not built to withstand the rigours of mobile use and we have seen this first hand. Many customers have dropped in to see us with broken cooling systems and failed compressors. On the other hand, caravan fridges use compressors that are internally sprung and made specifically for the demands of mobile use.
A household fridge uses the rear and / or sides of the fridge cabinet to remove heat. For built in installations, this is not a good layout for heat transfer and results in more power usage. A well designed caravan fridge will use an external, fan assisted heat exchanger to create more air flow and heat transfer.
A 240V fridge will need an inverter that operates non stop. Depending on the inverter you choose, the constant current it uses will be around 0.5A every hour, 24 hours a day.
Is your home fridge covered under warranty for use in a caravan? Probably not. Most appliance manufacturers exclude warranty for any fridge which have been used in anything mobile; caravans, vans, buses, boats and everything that moves.