Most slide units have a roller on each side to both support the slide and make a smoother move, some long slides have 3 rollers for the slide to support the weight. With the slide partway out, or in, the rollers may be seen. Sounds like one has broken, or the mechanism has severely slipped out of adjustment. If you are a DIY person, you will find the adjustment instructions online..
In the meantime, to prevent carpet damage, consider buying a set of Slide-Out Slickers.
. We bought a set to protect the new carpet, after we bought our 05 Grand Junction and the slide actually cut the carpet the first week of use.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"