Radio interference from other devices such as photoelectric sensors for security lights can prevent the garage door opener from responding to the signal from the remote.
Garage door inconsistent.
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The problem is often intermittent.
It s either the battery in your remote is dying or low at voltage or one of your neighbors might be using the same wave frequency as your door.
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Garage door opener inconsistent operation.
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Garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
Replace the batteries in your remotes.
To test trigger the remote while standing close to the motor unit if the door opens consistently from that close distance interference is likely the problem.