There are four common problems with garage door sensors three of these homeowners can fix themselves.
Garage door closes but then opens again.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
This is almost always the result of a dirty.
If the door starts to open but won t move more than a few inches the torsion spring may be broken.
You can usually tell if a torsion spring is broken by looking at it.
This brain can wear out in time so you could need a replacement.
Your garage door opens when it hits the ground.
It goes partway down reverses direction and goes back up again.
Get logic board replacement.
The garage door goes down then back up.
Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.
The garage door keeps going up and down.
If you re craftsman chamberlain etc garage door opener is closing and then opening up its likely a common problem related to the stop limit mechanism.
If this is a sears srt without external travel limit switches the internal travel limit is out of adjustment telling the opener to continue after the bottom of the door makes contact with the garage floor basically driving it into the ground until the force required exceeds what the safety system force is set at.
It may be your garage door sensor.
Garage door opener keeps going back up.
Disconnect the control station.
Close the garage door with the opener and watch it closely as it closes.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.
A broken torsion spring will also cause the door to slam closed instead of closing gently.
When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow.
Your garage door opens immediately after closing.
