This is a very common failure with single phase hvac equipment too.
Garage door opener seems weak.
Apply two drops of penetrating oil to the seams of the hinges.
Close the garage door.
Sooo if you are having difficulties check the bulb in the overhead motor compartment and if it s led replace it with an incandescent bulb.
It was tracked down to led bulbs causing rfi radio frequency interference and blocking the weak signal from the opener and or homelink.
If the range improves then the interference is coming from a device in the garage.
To isolate potential sources of interference turn the circuit breaker off to the garage and plug the garage door opener into an extension cord from another room.
It s important to get this switch at just the right distance from the motor so that the door is able to close all the way but the motor also knows to stop running.
Try making small adjustments.
From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.
This is related to the up limit switch.
If you see an error code flashing on the motor unit look up the error code in your owner s manual or refer to our error code charts to decipher the code and troubleshoot the problem.
T his is a pretty uncommon problem but one that can happen after you ve first installed your garage door opener.
Wipe away grease and grime buildup on all hinges rollers and roller pins with a damp cloth.
The garage door opener may signal an error code by flashing lights on the motor unit in a repeating pattern when the opener doesn t work.
These motors have a run capacitor that can get weak or go bad reducing the motor s start and run torque below acceptable levels.