Replaced defrost timer. I thought I had received a defective part since the refrigerator compressor did not start. After using google, I found out about the "dial" on the timer as you can see on the hole in the picture. It was shipped so the defroster is on making the compressor off. I used a screwdriver to turn the dial to make the compressor come on turning off the defroster. I liked how the refrigerator was designed to easily replace the defrost timer and to get behind the freezer to replace the defrost thermostat if needed. Thank you for the defrost timer replacement video too. Would be nice to include information on how to check the part using a multi-meter. Yes, I know that information in on the internet too but would be convenient to have it all here.