Can you hear the compressor running. Check round the back, is around the compressor clean, is there a fan unit, is that clean, no obstructions. Not sure the model, if the temp control is a dial, turn it, can you hear it click on and off. if a dial and no click, could be faulty control. As a light is on power is getting to it. If it is a power light flashing, could be a bad power connection, check plug and socket, try it in a different socket. I assume it is a single unit, model number always helps
Sheepdog, March 2011