You must ensure the fridge is level. If not level then the chemicals that create the freezing cannot circulate. If your fridge is level then you must get it attended to by a caravan specialist.
If you are a good DIY person then see my web site: www.ourwanderer.org/wan6.htm
BrianBW, July 2010
hi gemma,how long are you running it on the gas for, as it normally take's a fare few hour's for them to start cooling on any of the setting's