I have a LG model LAC26945TT that is about 8 years old. I started getting the error message er dH message a few months ago. I would unplug and plug the refrigerator and the message would go away for a day or 2, and then re appear.
I found here that some have replaced the thermostat, so I did that first. Did not change a thing. I then ordered a re manufactured control board (LG no longer makes this part) and that worked for a couple of months, no problem. Sadly the error message er dH occurred again. I was able to replace the control board at no charge, since it was only 2 months old. Again, second board and error message er dH is happening again.
So, what now? Everything cools great, and I really like the refrigerator. I hate to throw it out, but I'm still having problems with the error message for the defrosting of the refrigerator. What would be the next part I should replace to hopefully fix the problem?