My 2021 fifth wheel (bought July of 2020) has now been at the dealers for 2 and a half months because of schwintek slide problems. Both the bedroom and kitchen schwintek slides will work for a while and then suddenly quit working properly. And yes, the switch is being held for the proper amount of time after fully closing and opening to allow the motors to sync. And all of the other procedures recommended or required per LCI are done, repeatedly. My dealer, in coordination with techs from Jayco and LCI (LCI makes the slide components), has replaced all motors, all controllers, wiring harnesses, thermal breakers, measured for squareness of slide, checked rollers, made continuity tests, checked for kinking, and on and on and on. While it looks like maybe, and that's a big maybe, the bedroom slide may be fixed, but, the kitchen slide still does not work properly. The slide specialist at my dealer says that the schwintek system should never be used on the larger and heavier slides. He believes that because the kitchen slide is so heavy, and that it is obviously heavier on one end than the other, what is happening is that one end moves a few microseconds soon than the other, and then by the time the slide has moved out a foot or so the motors are far enough out of sync that the controller shuts them down. Or, that the slide moves in out or out far enough to get out-of-square just enough that the motors start working too hard and draw too much current through the auto-resetting thermal breaker and trips the breaker. It, of course, resets after about 15 seconds and you can keep trying. One of the techs at my dealer told me that based on the schwintek problems that he sees coming in for service he would never buy a trailer with a schwintek slide on any of the trailer's large slides.
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