Report "My Swan SR 5045 fridge is not cooling. The motor or compressor seems to be running all the time, rather than cutting in and out when the thermostat demands. What is this likely to be and can I fix it myself. I have read that it can be the coil not radiating heat away because of dust. Is the coil the grills running the length of the back of the fridge because these feel warm at the base but are cold everywhere else, although I thought the coil would be covered? Thanks"