What Are the Signs of a Failed Fridge Defrost Timer?

The next thing to investigate is the refrigerator's cycling. Does it go into a defrost mode? Does it revert back to cooling? When a refrigerator defrosts, it goes back to its factory set temperature, usually around 55 degrees Fahrenheit, and when it resumes cooling, the refrigerator should be at around 34 degrees Fahrenheit.

Placing a thermometer within the refrigerator can clearly indicate the changes in cycling, and if a refrigerator defrost timer needs replaced.