Radio interference from other devices, such as photoelectric sensors for security lights, can prevent a garage door opener from responding to the signal from the remote. The problem is often intermittent. To test, trigger the remote while standing close to the motor unit-if the door opens consistently from that close distance, interference is likely the problem. To solve the problem, identify the source of the radio interference and either move it or turn it off.
If the door doesn't open when you're standing close to the motor unit, follow the troubleshooting tips in our garage door opener remotes won't work video to help you fix the problem. If the garage door opener lights blink 10 times when you're trying to close the garage door, then the safety sensors may need adjustment or the sensor wiring may need to be repaired or replaced.