P.S.
While it's possible you may not need to adjust your limit switches, it's reasonable to expect that the upper limit may need attention due to cable stretch, differences in how the cable wraps on the drum, a problem with the pulley attached to the rear of the camper frame that enables the cable to change directions, and so on. The lower limit is less likely to need adjustment.
But the way the limit switch works is that is simply counts revolutions of the winch mechanism. It's not a "smart" switch. As the plastic gear on the limit switch turns the outer drum on the limit switch, it simply drives internal gears that move little actuator nubs back and forth on threaded shafts. As one of the nubs engages the plunger on one switch, it "opens" (shuts off) the switch, and the motor shuts off. There are two of these shafts with nubs on them and two switches. One or the other works as the extreme "limits" of the winch's travel. Adjustment is arbitrary...set by observation and trial-and-error.
As the winch and lift mechanism age and wear, it's possible for one or both limit switches to go out of adjustment.
As I mentioned, my limit switch mechanism failed completely, because the plastic gear and the "key" and "keyway" that enable the gear to drive the outer drum broke and sheared off. The gear and key/keyway should all be metal...probably brass or bronze for durability and corrosion resistance. ABS plastic (which is what I think they are made of) are simply not up to the rigors of a job like this in an environment that is both wet and filthy.
Effective this spring, my "limit" switch became paying attention and using the red tether cable that warns that you're at the top of the lift mechanism travel. I hold the red tether cable and stop when it gets snug (not tight). Maintaining the red tether cable is easy. Keep the screws snug, and don't be stupid enough to break the cable or connectors on either end.
On the way down, at the last minute I hold the lift cable and allow it to develop about 2 or 3 inches of slack in the cable to enable me to clamp down the roof without pulling against a snug cable. This is pretty much the same way you'd do it with a hand-crank winch...pay attention and nothing gets broken.
You know your roof is raised to the Goldilocks point (just right), when the entry door fits perfectly under the upper retaining turn-buttons on the roof that hold the door in place.
The limit switch idiot-proofs your electric winch, and if you allow others to operate your lift mechanism, that's a good thing. But NOBODY else operates my winch. Why would they? I don't loan the camper, and there's just no plausible reason to delegate that job to someone who doesn't know what s/he's doing...unless, of course, I'm dead. In which case, I don't care.
My wife, by the way, knows what's she's doing...she can operate a toggle switch and watch a little red wire get snug. But she's normally busy with other setup tasks.
Linear Mode
