However if all the garage door openers stop working at the same time then most likely the garage door antenna is not attached properly or the garage door opener itself needs to be reset.
Liftmaster garage door opener not working at all.
Motor unit assembly parts rail assembly parts and installation parts for liftmaster chain drive garage door opener models 1355 1355m 1356 1356m.
If your liftmaster garage door won t open it is possible to troubleshoot it.
Your remote is a radio transmitter.
Most modern garage door remotes transmit at 315 mhz.
Doors can get stuck due to problems with their power source photo eyes and track alignment among other things.
When you press the button on your remote the opener on your garage door receives it.
The most common reason for a garage door remote transmitter to stop working is a dead battery.
When a remote stops working on an existing door opener it s often because you need to change the batteries.
For the door to close correctly without reversing the safety sensors need to be aligned perfectly and there should be nothing in the way of the light beam.
Liftmaster 1345 1345m 1346 1346m repair parts list and diagrams.
Follow the procedure in your owner s manual for doing this.
If your door opener is brand new the remote won t work until you program it.
To prevent the garage door from injuring someone in the door or damaging an item in the way of the door all models of liftmaster garage door openers come installed with a safety sensor.
Before you can go about fixing your garage door remote you ll need to know how it works in the first place.
Fortunately resolving many of these problems can be done safely by the layperson.