We've had our Sundance Chelsea for about a year. Unless the waterfall is on we get an F1 code. We've had the technician out several times and he's changed different things and nothing seems to stop this code. DH talked to him this morning and he said he talked to Sundance and they say to just keep the waterfall on. Tech says we shouldn't have to do that, so they say try turning on different jets. Huh? When we're in the tub we have the jets on, but unless the waterfall is on, we get the F1 code. Our concern is that the tub is going to be a year old and they're going to say that it's out of warranty. (Actually, I'm not really sure how long the warranty is.) Is the F1 code really a problem? We're not even sure about that. We just know that according to the book, it's not supposed to be there.