LiftMaster / Chamberlain / Craftsman · Garage Door Opener error code

Code 13Maximum force reached going up

Single source High-voltage / caution

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

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

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

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Check lock/vacation mode first, then the remote battery, then reprogram using the Learn/SET button. Short range is often radio interference from nearby LED bulbs.

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