I'm in the same boat man.@DrkGrn Yeah - Ive cleared the errors, done factory resets, etc before going up in elevation, and still have the problem. Always get a spattering of error codes after trying to start it at elevation. Yeah it was suppose to be the new model that "just works" at elevation, thats exactly why I spent the extra money on this one
At 7000 feet it takes a try or two. At 8500 feet a few more. At 10k feet I want to punch a wall. At 12k feet I've given up on the heater working at all.
Expensive overcomplicated German sensor nonsense just like their cars. I have a backup propane heater.