Genie · Garage Door Opener error code

Excelerator 4 blinksForce settings incorrect

Single source High-voltage / caution

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Related diagnostic guides

Guide · Garage Door Opener

Garage door reverses or will not close (safety sensors)

Nearly always the photo-eye safety sensors: blocked, misaligned, sun-blinded or miswired. Sensors must be repaired, never bypassed. If sensors are fine, look at force/limits and door binding.

5 steps ~30 mineasy

Guide · Garage Door Opener

Door stops short or reverses at the floor (travel limits and force)

Usually travel limits or force need reprogramming, or the door is binding/out of balance. Test the door by hand first.

4 steps ~45 minmoderate

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