Took a few hours but got it fixed. It was the thermistor. Mine is an original “Not user replaceable thermistor“ model so you definitely need to cut a hole in the fridge and dig out all the foam carefully. Then snip off the tip of the old thermistor and splice in the new tip using phone jelly connections. Then plate the hole and use canned foam to re-insulate the hole. Flip fridge back upright and let sit for a few hours, recalibrate the display and then BOOM! Works like a charm. Thanks ARB and forum dudes. Got R Done.