John, (Stoughton, MA)
There are some adjustments that can be performed by the RVer as long as the manufacturer provided the troubleshooting literature. If you have doubts about tackling this yourself, or if you do not have thorough troubleshooting documentation, contact the manufacturer of the slide mechanism, (not the coach maker), and ask for a referral. They all will have a list of dealers and service facilities familiar with their products. Once you find a service facility in your geographical area, I would call ahead to be sure that shop employs technicians experienced with that make of slideout.