Marantec False Obstruction Detection Near Floor

Opener starts to close, then stops and opens again when the door is only a few inches from the floor.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Uneven floor causing one side to hit first, Loose bottom bracket or roller, Excessive friction at bottom seal, Down force too low

Safety first: Keep clear of the door while testing.

Inspect bottom hardware: Check bottom brackets, rollers, and cables for looseness or damage. Tighten and repair as needed.
Check floor level: If the floor is significantly uneven, adjust the down limit so the door stops when the highest side contacts the floor, and improve sealing on the low side with a thicker seal or threshold.
Adjust down force slightly: Increase down force one step at a time and test, ensuring safety reversal still works.

Medium 3/5