I replaced my 1200 cooling unit that I ran out of level for too long four years ago. While the Amish unit cooled better, it never cooled great even running it on 9 with 15 in the freezer and 40s in the reefer. This past winter the Norcold control board (orginal) stopped controlling the temps and a new thermistor did not solve the problem so I had to unhook the thermistor to get it to cool. Replaced the control board with a new one and now on 4 my temps this morning are -1 and 33 with a outside temp of 65 on electric. Last week with outside temps in the low 90s it was 4 and 36 without the fans coming on.
Like Old B I question any shop that has multiple problems with any product. Unfortunately the installation and baffling of these units is very critical to good operation, especially if it's in a slide where venting is difficult. While it's only been three weeks with the new Norcold control board, my 1200 has NEVER worked as well as it is currently. It's nice to only look at the In/Out remote temp once a day because the reefer is in the low 30's unlike previous years where it would be in the 40s and I would worry about it's operation.
I debated about spending $240 on the new control board BUT it's the best money I've spent in a long time. There's more to these units than just the cooling unit. Never thought I might need to go to 3 on the temp for a 1200.