Steve for Model Number ge model gss20dbmbww Freezer side not defrosting. After manual defrost runs for a month then quits freezing. Refrigerator side seems ok. Checked heater and it had continuity. Replaced control board with new p/n wr55x10942. Installed 5/7/2014. Now not freezing or defrosting again. Why would it run this long and then quit? My appliance dealer gave me the new controller but he does not seem to now why it runs this long then quits. Any ideas what to check or change next?? thanks for any help....steve.
Answer Steve, Since this is a defrost issue that you are having, the issue would most likely be caused by a faulty defrost thermistor which is located at the top of the evaporator assembly. You will want to check this thermistor to make sure that it has the proper resistance. The reason it works for a month is that it steadily builds up frost on the coils and once it gets to a certain amount then it affects the cooling of the unit. The thermistor part number is WR55X10025. The following is the resistance chart for the thermistor. The thermistor can be checked from the control board in the back of the unit. Thermistor Resistance Temperature(°F)Temperature(°C)Resistance in Kilo-Ohms -40 -40 166.8 kO -31 -35 120.5 kO -22 -30 88.0 kO -13 -25 65.0 kO -4 -20 48.4 kO 5 -15 36.4 kO 14 -10 27.6 kO 23 -5 21.0 kO 32 0 16.3 kO 41 5 12.7 kO 50 10 10.0 kO 59 15 7.8 kO 68 20 6.2 kO 77 25 5.0 kO 86 30 4.0 kO 95 35 3.2 kO 104 40 2.6 kO 113 45 2.2 kO 122 50 1.8 kO 131 55 1.5 kO 140 60 1.2 kO Note: To accurately test a thermistor, place the thermistor in a glass of ice water (approximately 33°F) for several minutes and check for approximately 16K O. Read More... Answered by AppliancePartsPros.com | Tuesday, June 10, 2014