3 the circuit board itself is faulty.
Liftmaster garage door motor not working.
Liftmaster garage door openers troubleshooting support get the liftmaster garage door support you need from chamberlain group.
The safety sensors are out of alignment.
Many people like to use rechargeable batteries in order to reduce waste.
Check power supply to garage door opener.
The track is not aligned properly.
The springs are broken.
The door needs lubrication.
2 the glass fuse on the circuit board has blown or popped.
Doors can get stuck due to problems with their power source photo eyes and track alignment among other things.
Common reasons your garage door opener may not be working properly.
Here are some troubleshooting tips.
If your liftmaster garage door is stuck and won t open it is possible to troubleshoot it in a variety of ways.
1 the transformer has failed due to a power surge.
The batteries in the remote control need to be replaced.
In most cases you ll see that the garage door starts opening again.
Remove the wires from the back of the door control.
Follow the procedure in your owner s manual for doing this.
When your garage door opener is not responding to any command from the remote or the door control you need to check if the opener has electricity.
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.
The garage door s path may be blocked.
When a remote stops working on an existing door opener it s often because you need to change the batteries.
If remote controls do not work then replace the wire.
If you tried operating your liftmaster garage door opener with the remote control or door control and it didn t work.
Go to the door control take the door control off the wall by popping off the push button.
Fortunately resolving many of these problems can be done safely by the layperson and doesn t require specialized tools.
If your door opener is brand new the remote won t work until you program it.
You ll need to try replacing the batteries and trying the remote again.
Test the remote controls.
If you have a liftmaster keyless entry system and the keypad is not working there are easy fixes that you can look at yourself to fix your liftmaster keypad.
If you have a wall mounted model check the lock switch.
4 a wire or wire harness is loose or burnt.
There is a screw under the push button that holds the door control on the wall.