The sensors are misaligned.
Blink door sensor.
Garage door light flashing but won t close.
When you see you garage door opener lights flashing and the garage door will not close it could be the lock button or the safety reversing sensors.
If necessary you can close the garage door by pressing and holding the door control push bar until down travel is completed.
Sensor wires have been shorted.
Each sensor has an led light on the exterior of the sensor.
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Sensor wires are disconnected.
Look at both the garage door sensors.
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Circuit board blinks a third time.
For most older units use the information below to see what the issue is.
Circuit board blinks once.
Start by checking if.
If one of the leds is blinking the sensors need to be realigned.
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Starting at 34 99 mini is a great first step towards keeping your home more secure.