Check if the safe t beams red led light is flashing.
Garage door will not go down light flashes.
When the safety sensor is not properly aligned or something is obstructing the light beam the garage door will fail to close.
If it is a new installation check the postion of the door arm.
Sweep the garage floors and look through the sidings to ensure that there are no objects to obstruct the door.
Adjust the limits as needed.
There is one on each side of the door.
The garage door will.
To troubleshoot your liftmaster safety sensors.
Once you know that the lock button is not the issue you ll want to check to see if anything is obstructing the sensors or if the sensors need to be realigned.
If you push the garage door opener switch when the sensors are obstructed or not aligned properly your garage door will reverse and the lights will blink 10 times.
Eliminate any item in between the sensors.
The liftmaster garage door opener lights will flash for ten times.
Since the lack of power supply is a common problem check the wires around the sensor when the led lights are not flashing.
Many times the malfunction can be due to a loose connection or broken wire.
If your garage door opener is still blinking try realigning the safety reversing sensors.
They both have lights and both lights should be on.
It goes partway down reverses direction and goes back up again.
First check the sensor lights.
If the operator s light bulb isn t flashing once door reversed release the door to manual mode while it s fully closed raise and lower it by hand to check for any obstructions and that the door is correctly balanced.
Pressing wall mount it closes.
Check if the limits are properly set.
Check if something is blocking the way of the safety sensor.
Garage door will go up but not come down when using remote.
This is almost always the result of a dirty or obstructed safety feature.
If your garage door opener won t open and the motor unit lights blink 10 times it usually means you have a problem with your safety sensors.
Depending on the brand of garage door you have one of the sensor lights may flash dim or go out completely when the beam is interrupted.
If the door goes up but you can t make it go down you probably need to adjust the sensors.
If you notice this happen start by seeing if anything is obstructing the.
Garage door starts down then stops and goes back up or safe t beam system malfunction.