We have a 2018 Keystone Cougar 279 RKSWE. It leaked from the get-go, on the inside TOP, of the pass through compartment door, coming from somewhere up above !
Took 2 trys at dealer to locate, as we could not find the origin. Turns out, the area where the shower pan joins the walls, had little or no silicone sealer. Got it fixed under warranty, and now seems OK. At the same time, we also had a puddle develop, inside, on bathroom floor, next to shower. I agree that a thorough PDI is very important, but how does one check for smaller, hidden leaks, when it's new, and you first pick it up ???!!! Dang near impossible !
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