Shan for Model Number RB1855SL My fridge kicks on and will cool to the set temps on the digital display. After that, the temp on the digital display reads that the temps are -2 & 36; however, the inside of the fridge and freezer are warming up. The only way to get the fridge to kick back on is to unplug it and plug it back in. I have replaced the main control board, the start relay, and the temp sensor in the fridge compartment. I have checked the evap fan and it is working. What else could be causing the fridge to do this? What should I replace next for the fridge to recognize the actual temp and to kick on when it needs to without unplugging it? Thanks.
Answer Shan, The possible cause for this issue would be that there could be a faulty defrost circuit. Check both defrost circuits for an Open thermal fuse. Access the main control board in the compressor compartment and locate the CN70 connector. For the refrigerator compartment check for an open circuit by taking a resistance reading between white and grey/ for the freezer side check between brown and grey. If a open thermal fuse is identified then it is recommended to replace both compartment thermal fuses with a bi metal as well as both defrost sensors. The bimetal is part number DA47-10160H and the sensor is DA32-10105R. If one of the thermal fuses fail, the unit will not come out of defrost and will only restart when unplugged. Once unit is powered back up the board defaults to factor settings. The unit runs and will go into defrost 4 hrs of compressor run time and never come back out until unit is powered down and back up again. This will occur every 4 hours of compressor run time. Read More... Answered by AppliancePartsPros.com | Wednesday, April 29, 2015