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sounds like the damper control is bad and the damper is not opening and closing properly, it controls the airflow from the freezer compartment to the refrigerator, if its staying open then it would basically make your refrigerator much too cold:
Refrigerator Damper Control Assembly
Part #: WR9X513
listed as 7914 on the diagram:
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some models have a return air damper at the bottom left side of the fresh food section that can be adjusted I can't tell from the diagram I am looking at if yours has one or not, it probably does.
ya you need to check that the damper is opening and closing, because as you say it freezes even when its not running so whats prob happening is when the refrigerator is cycled off from the thermostat there is no fan running to circulate the air so if the damper is not closing all of the cold air settles to the bottom which causes the produce in the drawers to freeze while the top shelves stay above freezing.
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k its impossible to turn off the freezer and still have the refrigerator work because all the air in the refrigerator comes from the freezer, evaporator in freezer gets cold, evaporator fan circulates the air from the freezer to the refrigerator all that freezer side control does is open and close the damper depending on the setting and seeing as it sounds like the damper did not close that is your problem.
the schematic is not showing a lower damper at all for that unit, you may have pull it apart and have a look the part number will be on the damper.
when you get around the fridge send me a picture of the inside of the fridge and send me a picture of the damper you are referring too also because the only damper I see is the one in diagram listed as 7914
nope there is no damper there at all. If the damper at the top is working properly then I would suggest replacing the thermostat, I have a feeling its allowing the unit to get to cold, the best way to actually find out for sure would be to put a temperature recorder in the refrigerator for 24 hours to record the unit temps.
that model obviously is older and does not have all the fancy thermister sensors that control temp, it just has the old style thermostat, so the only possible thing that could be wrong is A: the top damper is not opening and closing at it should:
B: the thermostat is not allowing the unit to cycle at the proper temps, try turning it up to a higher setting for a few days and see if that helps with the freezing in the crispers.
there is one fan in the unit that circulates air its located in the freezer, and it blows air out of the top damper from the freezer. sounds to me like you should replace that thermostat because whoever replaced it the last time did not use the correct one.
it's part number WR9X588, but it is no longer being made, I found some that had sold on ebay but no listings for any right now, you may want to keep an eye on ebay and amazon for one to pop up for sale.
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