Glad you got it retracted ok. The wiring running within the slide seal is the problem in most cases. The room pushes out hard against the seals. There are no mechanical or electrical limit switches on this setup - it's all based purely on torque (amp draw) that the controller sees coming from the little electric motors that drive the slide. Since those tiny little connectors are behind the weatherseal it doesn't take many cycles for it to smash and wear down the wiring outer shielding and eventually either break a few wires off or cause them to short against each other. I've lost count of the number of wiring harnesses that I've repaired right at the motor... some twice. If the customer doesnt mind I am leaving the connector harness outside of the inner seal and mounting it on the wall out of the way - this prevents it from getting smashed and rubbed.
A coincidental issue arises from the harnesses being chafed, which I see/repair a lot. If one motor quits due to wiring becoming chafed the end user hasn't realized the room is cocking to one side or the other as the other motor is still driving normally and they continue to hold the button down - this causes it to wedge in the opening, strip the aluminum track that is mounted to the top/bottom of the room on each side - then when they try to retract it it generally breaks either of the drive gears from the drive shaft that runs vertically in the side jambs that connects the top/bottom gears.
Ive also seen units come in for repair that have ingested most of the slide seal down the side as well. That seal gets into the aluminum track that the gear runs in and ends up binding so badly that either the aluminum splits or the gear on the shaft breaks. I had one come in with a set of string lights that the drive ingested - room stuck about 1/4 of the way out... I guess the customer had the lights mounted or taped on the roof line and they must've not noticed they fell in the way of the slide travel.
I'm honestly surprised that those little motors along with that small 24 or 26 ga wire are heavy enough to move the room. Old telephone wire is of a heavier gauge.... I totally understand why manufacturers use the schwintek system - the room is shipped to the manufacturers pre-built (prehung if you will) already in their frames, motors installed with wiring connectors, plus they allow for different floor plan layouts since you don't have all the normal mechanicals in the way for a conventional slide unit. On the assembly lines they simply slide the whole room and it's frame in one piece in place and screw it from the outside, hook up 2 connectors and voila.
I can only imagine the service disaster these things could be once they get a few years on them and things start "loosening up". The worst thing for these is too much clearance between the sides and along the rails - add a few years of moving along down the road coupled with the lightweight construction of them.. oh my...
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified