In most cases that will solve the problem but sometimes a bad circuit board in the main unit is responsible for non functional sensors.
How to fix electric garage door opener.
If you have a screw drive opener you ll need to grease several spots along the rail gear at least once or twice a year.
Spray the sides of the garage door and the hinges with a silicon based lubricant.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
A garage door opener finally if nothing else works try replacing the units.
If you garage door is lowering then reversing back to the open position there could.
Use a lubricant that doesn t attract dirt.
Align the opener s rail with the center of the garage door.
Garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
Pay special attention to the alignment of the tracks the chain and the tightness of the screws.
Silicone spray is a good choice.
Place the opener on a ladder and use scrap lumber to get it at the height you need.
Checking the door before you start inspecting the motor make sure the garage door is fully functioning.
Also verify the antenna on the motor unit is in the proper placement.
The keypad doesn t work firstly check that you re using it within the range required for your opener.
You may also need to reprogram your keypad or replace the batteries in it.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
No matter what type of garage door opener you have you should always lube the rail where it comes in contact with the trolley carriage.
Follow the manufacturer s instructions to assemble the opener and mount the rail to the header bracket above the door.