I have an Amana SCD23VL
that is not cooling well enough. It recently quit working altogether (fan stopped and coils were frozen over), so I replaced the confirmed-faulty defrost thermostat. Now it is working "normally", but just isn't getting the freezer cold enough to freeze items.
Things I have confirmed: The fan is working, and appears to moving a lot of air. I checked the defrost timer and it stays in defrost mode almost exactly 30 minutes before kicking the compressor/fan back on. The fridge side stays cold at 3-7*C (37-45*F), and the freezer does get below freezing, varying from 15-35*F or so depending on when I look at the temp in the defrost cycle. I have cleaned the coils under the fridge.
My best guess at this point is that it is low on refrigerant. What are your thoughts?
What type of refrigerant is used in these? Do they have service ports like in automotive applications? I vaguely recall that there were generally sealed systems, so I'm not sure how they would be recharged. Any help/advice/info would be appreciated.