Customer Questions and Answers for Refrigerator Defrost Timer by Whirlpool

Tony, It sounds like the control board may have been set on a defrost cycle and normally within 30 minutes the unit will kick on. If this did not happen then most likely the control board may be defective and need to be replaced. Also check the relay on the compressor to make sure that it is not bad. You can pull the relay and shake it and if it rattles then it is bad.