I had the same issue when running to our first real trip in December of 2017 in a driving rain storm. Spent the majority of several days working on getting all the water out of the blower assembly and burner. Looks like kind of a design flaw as I was thinking that the water also gets into the intake. My problems mostly went away after the installation of a bug screen. Maybe it acts like a baffle. Doug did a nice write-up.
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2018 Montana 3791RD (SOLD)
2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600 (SOLD)
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