I have a 24.1 and did my first trip a few weeks ago and had the same issue. Dealer is working on a list of items and said that item is fixed so we will see. But I too let it run at default temp of 115 and just a bit of cold as that is too hot, and it cycled cold/hot. I then adjusted the temp to 105 and no cold water and it was fine, but they say you should not have to do that. Dealer said there was some air in the line, truly doubt that is the problem but will try it again. I know the campground had weak water pressure and the manual on the tankless wants about 45psi minimum if I remember that correctly.
Jeff
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