Firstly check that you re using it within the range required for your opener.
Garage door opener travel adjustment not working.
After closing your garage door partway unplug the garage door opener.
A simple way to do this is to unplug the garage door opener and then plug in another device say your phone or a light bulb to see if it lights up.
Finally it s possible the garage door opener s motor.
A few minutes every six months or so will.
From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.
You may also need to reprogram your keypad or replace the batteries in it.
Hold down the open travel limit button until the door has raised all the way.
Also verify the antenna on the motor unit is in the proper placement.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
Verify that the opener does not have power.
Locate the force adjustment dials.
An incorrectly adjusted garage door opener and sensor can cause damage to the garage door motor lift mechanism your house or worse a person or pet.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
Find the chamberlain garage door opener technical support you need to get your garage door opener operational.
They can be found at the back panel of your craftsman garage door opener to increase the open force turn the open force dial about 1 4 of a full turn similarly to increase the close force turn the close force about 1 4 of a full turn operate your garage door.
Program the garage door opener to recognize when your garage door is completely open.
Check power supply to garage door opener.
The green indicator light will flash twice to confirm.
The light should be out and the multimeter should show zero volts ac across any exposed electrical contacts.
This is how to fix a craftsman liftmaster garage door opener that will not respond to up and down adjustments.