This is almost always the result of a dirty or obstructed safety feature.
Garage door will not go down light flashes.
Check if something is blocking the way of the safety sensor.
Many times the malfunction can be due to a loose connection or broken wire.
Adjust the limits as needed.
Sweep the garage floors and look through the sidings to ensure that there are no objects to obstruct the door.
In this video from sears partsdirect we ll show you some simple fixes like checking the garage door opener s alignment and clearing obstructions.
There is one on each side of the door.
First check the sensor lights.
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.
The garage door will.
To troubleshoot your liftmaster safety sensors.
If you notice this happen start by seeing if anything is obstructing the.
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.
Make sure only the safe t beams that came with this garage door opener are installed.
Check if the limits are properly set.
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.
The liftmaster garage door opener lights will flash for ten times.
Check if the safe t beams red led light is flashing.
Since the lack of power supply is a common problem check the wires around the sensor when the led lights are not flashing.
Pressing wall mount it closes.
If the door goes up but you can t make it go down you probably need to adjust the sensors.
Eliminate any item in between the sensors.
If your garage door opener is still blinking try realigning the safety reversing sensors.
If it is a new installation check the postion of the door arm.
Garage door starts down then stops and goes back up or safe t beam system malfunction.
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.
It goes partway down reverses direction and goes back up again.
They both have lights and both lights should be on.
Garage door will go up but not come down when using remote.