There are some common reasons your garage door opener may not be working.
Garage door problem solving.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
How to troubleshoot problems with a liftmaster garage door the typical liftmaster opener system.
This page should help you troubleshoot your garage door problems.
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.
If everything else is working well then it could be that the power in.
If this is the case then replace the fuse or reset the breaker or gfci and try the wall switch again.
When the door won t close or it closes only part way and immediately opens again.
Here are some troubleshooting tips.
Problems with the safety sensors.
Check for and clear any obstructions in its way.
If it is be sure that the lenses are mounted five to six inches from the floor on either side of the garage door opening.
If you tried operating your liftmaster garage door opener with the remote control or door control and it didn t work.
Finally it s possible the garage door opener s motor.
One of the more difficult problems for do it yourselfers to diagnose is a worn cable pulley on an extension spring door.
While many problems that keep the door from opening are caused by broken springs a lot of other parts could be keeping your door from functioning properly.
Garage door reversing before closing garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
If problems persist check the mechanism or have an authorized dealer do it for you.
The wall switch doesn t work first check your fuses gfci or breaker to see if any of them have tripped broken or burnt out.
If the problem persists check to see if the red safe t beam led indicator is blinking.
Look for full service liftmaster provantage dealers recognized for their expertise and quality of service.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
If you garage door is lowering then reversing.
If troubleshooting doesn t solve your issue it s time to contact an authorized liftmaster dealer.
Check power supply to garage door opener.
If the problem persists check to make sure the garage door is in good enough condition to open i e not rusted make sure the door is not in vacation lock mode and the force settings are correctly set up.