Make sure it s properly installed.
Liftmaster wall mount not working.
If your door opener is brand new the remote won t work until you program it.
Unplug the opener what should be for a good minute in the meantime remove the batteries from the transmitters including the key less and if you have a battery back up you would know this that if the house power was cut the garage door could still be opened there is no battery in the wall transmitter plug back in the opener and replace the batteries which should be fresh then try the wall transmitter only if that functions correctly then re program the transmitters.
If you own a wall mount garage door opener like the liftmaster 8500 for example the first thing to check is the cable tension monitor.
To interact with this component access the preview mode.
Follow the procedure in your owner s manual for doing this.
Remove the two wires for the door control from the motor unit.
This might not be the issue if a professional installed it and it was working fine.
If you have a wall mounted model check the lock switch.
Whether you have a belt drive chain drive or wall mount model find helpful resources manuals videos and more to help you diagnose and fix the problem.
Get the liftmaster garage door support you need from chamberlain group.
They are located in the red and 1st white terminal or the.
If there is a back up battery disconnect the battery.