Product review (5 stars): Exact fit and easy to replace
My Sears side- by- side model 106.54609300 freezer side was staying at around -25 degrees. The fridge side was staying within the desired temp range. I purchased the thermistor as this seemed to be the problem, no temperature control. I did have to take the back part of the inside of the freezer apart to access the bi-metal thermostat (also had a defrost problem) and the thermistor. The thermistor was along the upper right corner of the freezer. It fed through the freezer into the fridge and into a plug attached to the difusser ( controls the air flow from the freezer to the fridge side). The difusser had to come off the side wall by 4 simple prongs sticking through the wall into the freezer. The thermistor was pulled through the opening, the new one fed through, the diffuser put back, and then plugged in. As I said I also replaced the bi-metal thermostat (another review). Ice was gathering in the bottom of the catch pan and the bottom of the freezer. I think the main problem was the freezer getting too cold. Instructions on where the parts are located and how to change everything can be found online. This was a perfect fit and now the fridge has been reset to the original initial settings of 0 degrees for the freezer and 36 degrees for the fridge side. It works like new. Save yourself possibly several hundred dollars and do it yourself. If you do mess it up your are only out a few dollars and then call for service.