kitchenaid/whirlpool kssc48qvs00. For several weeks, unit was running constantly, other than a few times a day when unit would cycle off for half a second and then start again. This would repeat about 3 times and then start running again for hours. Unit maintained consistent cold temp (0,37). I turned unit off at control panel, not main power, yesterday and 15 minutes later, unit would not re-start and control panel did not come back on. Display enters startup for about 3 seconds and then goes out. Water dispenser and lights working properly. Unit was purchased 4 years ago. Appreciate any help you may offer.