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We have a 2009 Bighorn 3400RL and experienced a similar leaking condition with the plastic fitting on the hot water by pass valve. We attributed our leak to high water pressure in the campground. Normally we use a pressure reduction valve, but find it too restrictive so it wasn't utilized on...

Good advice, we will check out home depot. Yes, we have had 2 thermostats and both were defective. Happy rving!

Thanks everyone, We found the problem, and that is a faulty thermostat. The little lever that makes the connection, was not aligned properly. Heartland has said that they have had problems with the thermostats. Thanks for all of the good advice, and really enjoy the site.

We have a 3400RL that we purchased new last year. The Fantastic Fan in the bedroom upstairs works with no problems. The one in the kitchen does not work, but we vaguely remember that we may have to do something extra when we turn this fan on. When we turn it on at the temp. control, nothing...