LiftMaster / Chamberlain / Craftsman · Garage Door Opener error code

4-4Lost motor travel signal while opening

Cross-checked High-voltage / caution

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Related diagnostic guides

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

Guide · Garage Door Opener

Noisy garage door opener

Loose fasteners, poor lubrication, slack chain, worn drive gear or an unbalanced door. Separate opener noise from door noise by running each alone.

4 steps ~40 mineasy