The GE WR55X10025 is a nearly-universal temperature sensor used in nearly every GE Side by Side and French Door-configured refrigerator made. If this sensor is defective, you'll find an open short on a multimeter between pins 4 and 5 on the control board.
This sensor has the same resistance reading of the Samsung Refrigerator Defrost sensor line, and should test approximately 5k ohms (5,000 ohms) at 77*F.
In the very near future, we'll offer a "Splice Kit" add-on that will make splicing this into your refrigerator even easier and pain-free.
I fixed my GE refrigerator using Ben’s YouTube video and buying all 3 parts from him: Defrost thermostat, defrost sensor, and defrost heater. I was skeptical at first because the prices were cheaper and there were no reviews on the parts. Everything arrived on time, fit correctly, and are working well. It’s been about 3 months and I haven’t had an issue. I saved a lot of money thanks to Ben!