I should add, for those not familiar with this, that the slide topper has a lever that is normally in an unlatched position that allows free rotation of the slide roller in and out. Just like the larger manually operated awnings, the same type latch is used to lock and unlock the awnings so they don't open while driving and so they will latch when opened. On the topper, if the latch gets caught on something or if the set screw is loose, it may wiggle into a position where it will catch on something. When that happens, the slide topper will not open any more and it WILL prevent further opening of the slide. The motors sense high current and react as if the end limit has been reached. Hence, it will close just fine because the latch that was caught will reverse direction also and function normally to close. The latch/lever can be seen on one end of the roller.
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