GE side by side not freeezing/cooling

GE side by side not freezing and only slightly cool. Of course, refrigerator is only slightly cool.

I have removed the lower rear panel and cleaned the coil with a vacuum and brush, but that did not change anything. (over 48 hours later now)

Interior lights are on, compartment fan running, as well as condensor fan.

Ice maker tray and auger were removed some time ago due to lack of use. (My 82 year old mother’s fridge)

Any ideas where to check next?