Is your refrigerator not cooling?!
If it's showing one of these three codes, it's simply in lockout mode and your refrigerator needs to be reset and diagnosed:
"NO CO" - These models will show this code: 1200, 1210, N841, N641
"n" - These models will show this code: N621, N821
"if your light is flashing 5 times repeatedly" - These models will show this fault: N811, N611, N510, N410
Your Norcold refrigerator will show this code if it's not sensing a temperature drop while in operation. This is actually a safety precaution! If it continues to run while the ammonia solution inside the cooling unit is not flowing through the system it can cause a fire. Make no mistake, if the refrigerator is not cooling then there is certainly a probem with the ammonia solution flowing through your cooling unit. The trick is to find out exactly what is causing this to take place. We don't want to simply explain how to reset the power board because if it has gone into this fault then it will always go right back into the same fault when you start it up again. You need to have it diagnosed!