Freezer working, Fridge not defrosting, building up ICE
 

I have a Samsung RS253BASB, the freezer side is working fine but the fridge side is not working properly. I have already changed the sensor and the PCB main board as it was recommended but still did not do the trick. Run a diagnostic test and I am still getting the PLC error and fridge defrost error. What else should I do to check the real problem of my fridge. :confused:

Ice is building up on the Fridge side......

Is it time to give up and buy a new fridge. :(

Thank you.