How do I recalibrate my garage door?

To recalibrate your garage door, meaning to reset opener limits and force settings so door opens and closes fully and safely, you need to follow opener specific steps, as recalibration ensures door seals and safety sensors work. First, for travel limits recalibration, locate limit adjustment screws or buttons on opener motor unit hanging from ceiling, often labeled Up and Down or with arrows. Close door and check if it closes fully to floor without gap, and opens fully without hitting stop bolt. If not, adjust down limit screw clockwise to decrease travel if door does not close fully, or counterclockwise to increase, and up limit similarly, making small quarter turn adjustments and testing each time with wall button until door closes sealing weatherstrip and opens fully. For force recalibration on newer openers with MyQ, hold adjustment button until LED blinks, then run door open and close cycle so opener learns force needed. You may also need to recalibrate safety sensors by ensuring photo-eye sensors near floor aligned with steady lights, cleaning lenses, and ensuring no obstruction. If door was off track and put back, recalibrate balance by pulling emergency release and manually lifting door halfway; if it stays, balanced, if not, springs need adjustment by professional. After recalibration, test safety reversal by placing 2x4 under door; door should reverse when hitting object. Recalibration takes 15 to 30 minutes. If door still misaligned, call professional costing 75 to 150 dollars.