I had a Hotpoint fridge freezer doing exactly the same as you describe, eg. getting warm, excessive gurgaling, and other loud noises. Got the engineer out who found that the foam sealing strip around the lower area were the motor was had come away from the the sides of the freezer allowing warm air to rise up into the upper areas of the fridge and freezer. He replaced the sealing strip and it has worked fine ever since. Try it. Regards. Mary.
Mary Swinton, February 2010