Originally Posted by theHueg
I’m curious how it would still be working then if I have the warning icon? Presumably, if the GFI had been tripped, the unit wouldn’t be on?
To be fair to those who responded, you never mentioned that your Truma was working, that is putting out heat or heating water. If that is the case and you are seeing this error you have a bigger issue such as a control module failure.
The Truma control/display functions are 12VDC and don’t require 120VAC, but they are there to report issues when 120VAC is missing from the heating elements. Odds are this is what is being reported.