GE GSS25LGMBWW Fridge/Freezer not cooling - Multiple tests, no luck!

[Tb12goat]

Model : GE GSS25LGMBWW
Age: OLD 10+ years

Hi,  hope all is well. My GE fridge/freezer is not cooling properly, ice cream turning into milkshakes and vegetables going bad incredibly fast. Freezer hovers between 24-34f degrees, and fridge side stays between 42-50f degrees. I bought a multimeter and tested most of the common problems with no luck.
I'm hoping someone can give me an idea of what i'm missing. Ill post the results of my tests below.
Thanks.

What i have done:
Cleaned condenser coils
Condenser fan is running
Compressor feels warm  and i can feel vibration.
When i open/close the fridge/freezer i can hear the fans kick on/off.
Voltage coming into the control board is 122v (orange pin/first pin on blue connector)

Evaporator coils have some ice, but i'm not sure if its enough to cause alarm. 

J1 Thermistor Pins on control board:

**Tested when directory connected to control board** 

Image: 
FF #1 - 5.71 blue/red stripe
FF #2 - 6.01 yellow
Freezer #1 - 8.36 - red/white
Freezer #2 - 8.68 Freezer blue/white

**Tested with harness unplugged from control board** 

FF #1 8.65 blue/red stripe
FF #2 9.55 yellow
Freezer #1 17.15 red/white
Freezer #2 16.52 blue/white

Is that normal for the thermistors  to test differently when when harness is unplugged?

J2 Pins on control board:
P3/P8 Fan motors +12v (White/double red) 13.70v
P3/P4 Evap fan motor (white/) 13.66v
P3/P5 Condenser fan motor (white/yellow) 12.07v