Display on LG
refrigerator shows Er-dH and the refrigerator is not cooling good.
I took a look inside the freezer and found the inside back wall had frost build up on it.Solution:
I fired up the laptop and took a look at the service repair manual for this LG refrigerator.
The Er-dH error code that was being displayed is a defrost heater error code.
Using the step by step troubleshooting guide that is included in the service repair manual it was easy to determan that the defrost relay was stuck.
I had to replace the main PCB and the fuse that was located above the defrost heater in order to get this refrigerator back in working order.