My fridge keeps leaking. It seems to frost up on the back inside and then it melts and leaks all over the bottom and then onto the floor when the door is opened. In the gap at the side of the fridge it feels like a lot of heat is coming from the back of it, is that normal? I've tried changing the temperature up and down using the dial inside but it doesn't seem to make any difference, it still leaks. Does anhyone know what the problem might be and if it is fixable? OR has it had it, and I need to buy another one?