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.
Garage door inconsistent.
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The problem is often intermittent.
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Garage door opener inconsistent operation.
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If you are wondering why your garage door opener only works sometimes there could only be two likely reasons.
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.
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.