It has 3 function buttons.
Garage door opener lock mode.
If an operational problem exists and the garage door opener will not close the opener can be forced to close.
The constantly flashing wall button simply means that the door was either put into lock out mode by someone using the wall panel control or for some reason it defaulted into lock out mode in error.
Back lit panel makes it easy to locate.
Check garage door for binding.
To shut the garage door upon departure.
Press and hold the wall console button until the garage door is completey closed.
This means that you have to get out of the car when you get home unlock the door and lift it yourself.
This video will show you how for most garage door openers including liftmaster chamberlain sears.
The locking mechanism protects access to the garage by disabling the power unit.
Depending on the manufacturer this setting may be known as.
The lock switch is used to disable the remote controls.
Check the console lock switch.
Disconnect the garage door opener and use a manual latch to lock the door.
Check for interference from adjacent photo eye sensors of any brand.
If this is the sears dark gray wall switch with a light gray lock button on the lower right corner it s not uncommon for it to stick in the depressed position.
Sounds like your lock button is stuck in.
The garage door opener flashing wall button is completely different from photo cell led light being outor the motor head led light flashing.
The location of the switch will depend on the model of the device.
If the system is locked then the green indicator on the console will be flashing or the words lock mode will appear on the lcd display for elite and estate series openers.
Door starts down then stops before it is closed.
Open close lock and light.
Look for labeling such as vacation on the unit then press and hold this button.
If your garage door opener is locked check the wall control it may be set to vacation mode.
On chamberlain garage door openers includes liftmaster and sears systems the lock switch is indicated by a padlock.
Just like the old days.
It s only plastic it will pop out easily.
On many models the vacation mode allows you to use the remote one time after it is activated.
For some units lockout mode produces a flashing button.
It also means that someone without the key will not be able to do the same thing.