I have personal knowledge of three Norcolds on electric that caught on fire so it's not just on propane. Two of them had the Norcold recall on them. The 1200s have the same size coils as a 6 ft.Âł Norcold so it is working harder and fatiguing sooner.
Each time you' run too far out of level you build up a metal deposit inside the coils which will eventually create a blockage. You need to install the ARP shut down device which will shutdown the refrigerator before it creates these metal deposits.
In the last 5 years I've spent over $1800 on my POS 1200 Norcol. I'm in the process of going residential.