Customer Questions and Answers for Refrigerator Electronic Control Board by Whirlpool

Marylu, You will want to pull the rear wall in the freezer compartment and check the evaporator coils. The evaporator coils should have a full even frost pattern from top of coils to the bottom. If the coils do not have a even frost pattern and are impacted with frost then the issue will be with the defrost system. If there is very little frost on the coils and just a little or none at the top then this would be either a restriction or leak in the sealed system. Also make sure that the condenser coils are clean and the condenser fan motor is running.