I fixed mine by replacing a defective heater element. Cost about £24 on ebay.
At the back of the unit is the flue out let.This is wrapped in insulation. The heaters can be seen going into this. I disconnected mine at the connector block on top of the fridge and used a multimeter to check the Ohms.
It should be infinity. Compare it with the 12V heater. Alternatively just take a punt. It probably is the heater.
little_noodles, March 2010
