Amana defrost thermostat

You will need to replace the defrost thermostat located on the coils. Here is the part to order.

Hello, on most refrigerators when you are trying to access the evaporator coil to diagnose a defrost issue you would remove the rear panel on the inside of the freezer by unscrewing the screws that hold the panel to the back wall. There are some also where the coil is located in the floor of the freezer as well and likewise you would unscrew those screws which hold the floor in and slide the panel outward. By removeing this panel this gives you access to the evaporator coil. There are two key parts which should be tested in this area with a multimeter. The first is the defrost thermostat which you would unplug the machine and disconnect the thermostat and perform an ohms test on it. Usually a defrost thermostat would read about .50 ohms or higher if it were functioning properly. The next part would be located usually under the evaporator coil and is called the defrost heater. This part also you would perform a continuity test on and most usually give an ohms reading of 20 ohms or higher to test as functioning properly. If you find that both these are working good message me back for further instructions as to the adaptive control board or the defrost timer depending on which you do have. Note all ice you find on the evaporator coil has to be defrosted with a hair dryer as well as any ice build up on the evaporator fan or drain area located under the coil. If you have any further questions message me back. I await your reply.
Thank you,
Rick

Hello, You would have to pull the unit out away from the wall and remove the rear panel down the bottom that gives you access to the compressor area. You can see if the leak is coming from either one of the water lines or if the leak is coming from the compressor drain pan. The compressor drain pan is where the water that is defrosted off the evaporator coil goes down a hole with a tube attached to it into this drain pan in which the compressor fan in the unit is supposed to evaporate the water. Try removeing the rear panel on the inside back wall of the freezer couple 1/4" screws. This will give you access to the evaporator coil. If you see any ice build up on the evaporator or under the evaporator blocking the drain then your unit would be having a defrost issue. Message me back after you check for the defrost issue and also the compressor drain pan if these are clear then you would have to diagnose if your unit had water or ice going to the door both of these water lines. I await your reply Thanks Rick
p.s if your unit does have water going to the door also assure the connection that goes into the bottom of the door is not broken or cut as well I will look up your schematic when you respond if you need me to point out any areas of this repair

When it comes to refrigerators I always have a most likely to least likely formula to try to solve the reason of why the freezer or fresh food compartment is or is not cooling properly. So knowing that the cold air comes most times from the freezer compartment I would look to see if the fan inside that compartment may just be slowing down because it is possible there is frost building behind the freezer wall due to most likely defrost not taking place and creating a huge block of snow and ice blocking air circulation.. Ice will show on the outside wall of freezer also if possibly the defrost heater is burned out. There are so great testing tutoral'son the following links! So now having your model number that most people don't think about I will look to see just what type of defrost system your model has=> ABB1927DE EVAPORATOR AREA and Rollers location 16 in photo. That part is your models=> 67002135 Defrost Heater



Amana, ABB1927DE User Manual


Sometimes the 67003636 Evaporator Fan Motor goes bad but thawing is more severe when the evap. fan goes bad and may be tricky stopping and starting on its own before true-ly burning out=> 67003636 Evaporator Fan Motor



here is a Amana ABB1927DE Wiring Diagram=> HERE
67003426 Defrost Thermostat Hey I know there is a lot of material here so I will be here if you should have questions, Thanks, Sea Breeze

If you see frost behind the back wall or begin to notice the fresh food compartment getting warmer then you might have a defrost problem. The defrost system is a heater and termination thermostat inside the evaporator and A timer. The termination thermostat shuts down the heater when it gets to be warm enough for the frost to melt. It is important for the thermostat to kill the heater because the defrost mode is 21 minutes long.
If that heater was to stay on for 21 minutes the ice box would be severely damaged. The Timer might be hung in the run mode and not jumping into defrost every 8 or 10 hour as it should. The heater element might have gone bad or the termination thermostat might be swollen and failed. That is some ideas to check. Service manual


If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

This link will show an exploded view of the area. Part number 6 is the defrost thermostat. Cut and paste into your browser.

http://www.appliancepartspros.com/partsearch/model.aspx?model_id=273&diagram_id=810195#d810195

Basically you need to empty the freezer, remove the drawer and back panel, unclip the thermostat and replace, there are two wires and should be the same on the new one, use caution not to damage the evaporator coils.

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air
check defrost heater, defrost thermostat. If the heater and thermostat are ok it’ll be the adaptive defrost control.Part 13 on this diagram of your fridge controls. http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=ASD2625KES&productCategoryId=0165000&brandId=1268&modelName=AMANA-REFRIGERATOR&diagramPageId=00005&componentDescription=CONTROLS&documentId=M0612301&backToLink=Return%20to%20Sub%20Components%20list

Is the evaporator fan in the freezer running.

Below the evaporator fan is the evaporator coils. Remove the back cover in the freezer to observe the frost pattern. Light frost everywhere(NORMAL) or a partial pattern of ice(LOW ON FREON) or nothing(LOW FREON OR COMPRESSOR PROBLEM).

There can be several reasons for that problem. Condenser fan not working properly, dust and obstruction in ventilation below the refrigerator, defrost element is bad, defrost thermostat defective or low on freon. Check the area under fridge for good air movement and look at the evaporator coils during the time of day the freezer is not cooling its best. If frosted over I think its inside where the element and defrost thermostat. If evaporator coils have some rows on botton frozen over with ice and top is sweaty then its a freon leak. Let me know and make sure you have it unplugged while working on the refrigerator, Thanks, Sea Breeze

Amana adaptive defrost:

Press refrigerator light switch five times in six seconds to initiate defrost cycle. Pressing five more times within six seconds will cancel defrost and go straight into the run mode. Similar operation on both bottom mount and SxS refrigerators. After the defrost terminator/thermostat opens, six minutes of dwell time occurs before the compressor and condenser fan motor will operate. After defrost terminator/thermostat open, 10 minutes of dwell time occurs before the evaporator fan motor will operate.

It sounds like you found it. Change the defrost timer.