Test garage door auto-reverse safety
Short answer
Twice a year, place a 2x4 flat under the closing door and wave through the photo-eye beam to confirm the door reverses on both tests.
Why It Matters
A door that doesn't auto-reverse can crush a child, pet, or car. Sensors and force settings drift out of spec over time.
Tools
- 2x4 board
How to Do It
- Lay a 2x4 flat on the ground centered in the door's path.
- Press the close button and let the door descend onto the board. The door should reverse immediately on contact.
- Remove the board, then close the door again and wave a hand through the photo-eye beam while the door is moving. The door should reverse when the beam is broken.
- If either test fails, locate the down-force adjustment dial or screw on the opener motor unit and reduce the force setting by one or two increments, then repeat both tests.
- If the door still does not reverse after adjusting the force and confirming the photo-eyes are aligned and unobstructed, have the opener serviced by a qualified technician.
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