Find the slide controller (most likely on the ceiling of the curbside basement compartment). On it is a small button. press it repeatedly and on the seventh press hold it until the LED light starts flashing. Run the slide all the way in both directions. I had the same problem and that cured mine and has been fine for the past two seasons.
2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2019 Ram 3500 Limited w/ Max Tow pkg