Safety sensor light is out and door wont open
If the courtesy lights on the motor unit aren't turning on, there may be no power getting to the machine, or there may be a fault in the control board. If the opener is getting mains power, I would suggest calling a Hormann dealer.
SOURCE: Garage Door Remote Not Working Consistently
Lift Master Security Plus remote works only intermitenly, It seems to lock after a few tries, Works from inside garage, Seems to lock up after few tries, Wall opener fine. Changed batteries several times. Can't understand why it works and then doesn't. Tried cleaning sensors and wires,
SOURCE: Garage Door only opens with wall unitq
The unit is in the lock mode, push and hold the lock button in for about two seconds and the green LED should stop flashing. Your remotes should work.
SOURCE: My garage door opener won't close the garage door.
Most likely your door sensors have been bumped and are not aligned properly. Make sure they are pointed at one another and the small light on each one is lit and not blinking.
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