My refrigerator is too cold despite the electronic control being lowered. A run of the diagnostic test indicated that the Defrost thermostat/ Defrost Circuit was Shorted. Would replacing with this part be the fix: AP4009073? Also, on your diagram for this part, it is indicated as number 30, however there does not appear to be a number 30 on the diagram. I only see up to number 28. Thank you.
Answer Matt, Not really, The defrost sytem if it failed would not cool very well, and there would be frost or ice on the back wall of the freezer compartmnt. You need to remove the grille from the back box cover, program into the service test mode and observe the damper and damper door operation (service test 6) to ensure the damper door opens and closes. Also remove the crisper drawers and check and remove any debris that has accumulated on the floor under the crispers, especially in the rear corners. It sounds more like an air flow or control board issue than defrost.
What volts should be coming out of the thermostat? I am getting 110 in but only 67 out.
Answer Ken, This appears to be a defrost terminator/thermostat, (we couldn't find a wiring diagram or parts diagram, In the defrost cycle there should be 120 VAC to chassis ground into the thermostat from the defrost timer/adc board, and 120 VAC out of the thermostat to the heater element. 67 VAC out would indicate a fault in the thermostat or a loose connection or a bad heater element. Thanks
Where is the defrost thermometer located?
Answer Hello Dennis. You need to remove the back wall inside the freezer to access and replace the defrost thermostat 12001937. It is located on the top of the evaporator coils inside the freezer.
That's interesting. Every one of the thermostats the service guys has put in looked different. I have only seen one thermostat that had a spec listed to tell when it opened. Is there any way one can find out the opening temp for each thermostat? The principal is so simple, any thermostat that opens at the right temp should work correctly.
Answer Duane, You're almost correct. Any defrost thermostat rated at the same temperature(+/- 10%) should work in a refrigerator. The more important issue is, the thermostat has to be installed in the same location and position as the original thermostat. If not, you'll create an "unsafe" situation. The Defrost thermostat controls power to the heater,and if it's in the position or location or rated at too high a temperature, you can create a "melt down". In the case of your Amana refrigerator, when the thermostat also controls the power to the evaporator fan, whenit resets at the end of the defrost cycle, so there are other possible cooling issues. You do have the correct part number for the defrost thermostat based on the model number you supplied, so you should be fine once you install it and connect the wires. Thanks and Good Luck