Samsung RF20HFENBSR fridge 3 door

[SKC]

My fridge the other day was getting salad greens icy at back of fridge. 
To be honest, fridge was completely packed.

This morning, freezer contents were defrosting, even though LED for freezer said -2. Clearly NOT -2 in freezer if ice cream melting.  I cleared out stuff from fridge and freezer. Ran a blow dryer in back of freezer to make sure no ice. Unplugged fridge, waited, plugged back in.

LED then read 46 for freezer when I plugged back in…but after a while, eventually went back down to -2.  But thermometer in freezer reads much warmer. 

Can the ok LED temp shown be wrong?  
When I put my hand inside freezer, it doesn’t seem as cold as LED reading.  (Inside fridge  temp is  same as LED reading 38) The refrigerator section seems to be working fine.  
 

How long, if freezer components working properly do I have to wait for freezer temperature to be correct? 
(since I’ve been constantly checking the freezer, the LED temp has risen to 1.  But Taylor old fashioned thermometer inside freezer reads 30—which is 16 degrees lower than LED read when plugged back in)

By the way, I can hear refrigerator is running. 
I am just trying to determine if this might be on the road to recovery or get help…which on this holiday weekend might be impossible!

thanks.

[jason.arthur.taylor.1]

Please include units.