The fridge is running on a crippled motor. The service tech said it is not uncommon to replace motors in Samsung fridges. Ours is only two years old. We have it on a voltage regulator designed for digital appliances, but who knows how good it is. Our voltage and current are any thing but steady. He plans to be back with a new one on Saturday. Today's service charge credited to the next one. We were told that Samsung service just plain sucks. I disagree. ~$150, including parts and both service calls.