In order to complete this job you will need the following tools:
Needle nose pliers
phillip screwdriver
1/4" nut driver
Ohm meter (Voltage Meter)
The first thing that you will need to do is disconnect your refrigerator from the power source. The defrost timer can usually be found within the fresh food section of your refrigerator inside of the control panel. Although there are some models of refrigerators where the defrost timers can be found behind the kick plate in the front.The defrost timer is going to have four wires plugged into it. Make sure you remember the color of the wires, and also which terminal they are connected to. Once you have made a note of this, then remove the two wires that are connected to terminal one and terminal two. Before you can check the defrost timer, you will need to set the timer to the defrost cycle. If you are not sure how to do this, turn the dial on the front of the timer that has two prongs on it. Turn the dial clockwise slowly until you hear a loud click. Once you hear this click then it will be in the defrost cycle. While turning the defrost timer dial, notice the cooling cycle is longer then the defrost cycle.
Note: This test is to be performed while the defrost timer is set to the cooling cycle position. Make sure that you make a note of the color of the two wires connected to the number one and number four terminals, then you can remove these wires. If you are unsure of how to turn your refrigerator to the cooling cycle, all you need to do is turn the dial clockwise again until you hear another loud click. It is now set to the cooling cycle. Place one of the voltage meter leads onto the number one terminal and the other lead onto the number four terminal. If the control contacts are closed, there will be a zero reading on the digital Voltage meter. On a standard voltage meter, the needle will move to the right. If the control contacts are open while in the cooling cycle position, the defrost timer is bad and it will need to be replaced.
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