So my fridge stopped cooling properly about a month ago and I found the freezer coils completely frozen inside the freezer. After manually defrosting everything I cleaned the VERY dirty cooling coils underneath the fridge and hoped it was fixed (dirty coils and/or possible freezer door left ajar). A few weeks later...it freezes over again. I was able to perform the manual defrost cycle during all of this, but wasn't sure it was automatically defrosting during normal operation. I assumed it wasn't. So I called a local appliance repair guy to have him come and troubleshoot (due to lack of available time on my own part). Guy comes out, and the first thing he does is try to put the freezer in manual defrost mode...but according to my wife (who also put it in defrost mode before) the guy didn't use the correct key sequence. Questioning him, he assured us both that he did and as a result diagnosed a bad electronics board. So now 4 days after the board has been replaced I can see continued ice building on the coils by looking through the little vent slats in the panel. Mind you, he didn't do anything more than look in the freezer to see the ice build up before diagnosing the board.

My question is, is there a normal amount of ice to expect on the coils, or should I call it now and have him come to continue troubleshooting.