If you are wondering why your garage door opener only works sometimes there could only be two likely reasons.
Garage door inconsistent.
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If you garage door is lowering then reversing back to the open position there could.
Garage door opener inconsistent operation.
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The problem is often intermittent.
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.
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.
Below are some ways on how you can resolve this issue.
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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.