Customer Questions and Answers for Refrigerator Defrost Timer by Whirlpool

You were pretty close to the correct wiring of the new timer. Based on the wiring diagram for the model number you supplied, the black timer motor wire should have been placed on terminal 1, the orange wire should have been attached to the no.1 terminal as well. The pink wire attached to the no.2 terminal. The white wire attaches to terminal no.3, and the red wire to terminal no.4. This will provide a defrost cycle every 8 hours of compressor run time, after the defrost bimetal(thermostat) closes. It may seem like it's a long period of time between defrost cycles, but that is determined by door openings and usage and loading of the compartments. Once you have it wired correctly and have double checked and made sure the evaporator coils are all clear of any ice or frost, allow the refrigerator to run and cycle a few days before yopu recheck for ice on the back wall or vents.