Garage Door Opener: Won't work
If the motor unit has power but won't respond to any remote or the wall control, the logic control board could be the problem. Unplug the garage door opener and check the wiring connections on the panel. If the wiring connections are okay, wait a few minutes before plugging the garage door opener back in—disconnecting the power resets the logic board after an electrical disturbance. Then test whether the opener works. If not, it's likely you need to replace the logic board and possibly other components.
Here's a troubleshooting video that can help you fix a garage door opener that won't work: Garage Door Opener Wall Control Troubleshooting Video
These repairs may help solve your Garage Door Opener problem:
Replace the garage door opener safety sensor
The safety sensor has a pair photoelectric eyes at the base of the rails—one eye emits an infrared beam and the other receives it. If an object, person or animal blocks the beam, the closing door reverses direction. Test the sensor eyes by connecting them to short wires directly at the motor unit. While holding the sensors close together and facing each othe, click the remote. If the door doesn't close and the lights don't blink, replace the safety sensors.
Replace the garage door opener gear and sprocket assembly
As the drive shaft and sprocket rotate, they drive the trolley that lifts and lowers the garage door. The plastic gear on the drive shaft is designed to fail if the garage door gets stuck in the travel tracks, protecting the expensive drive motor from damage. If the gear is worn or damaged, the door won't move properly. Replace the gear shaft and sprocket assembly if it's damaged or worn out.
Replace the garage door opener drive and worm gears
The worm gear attaches to the motor shaft and rotates the drive gear to spin the sprocket which drives the chain to move the door. Made of plastic, the worm and drive gears strip out to protect the motor from damage if the door suddenly hits an object in its travel path. Replace the drive and worm gears if they're worn or stripped.
Replace the garage door opener logic board
The logic board receives input signals from remotes, sensors and the wall control. It controls the electro-mechanical functions of the garage door opener. Replace the logic board if it doesn't receive input signals or doesn't control components properly.
Replace the garage door opener RPM sensor
The RPM sensor monitors motor shaft rotation and sends speed signals to the logic board. The logic board shuts off the motor and flashes the learn light 5 times when it doesn't receive speed signals from the RPM sensor. The door only moves 6 to 8 inches and then stops when the logic board isn't receiving speed signals. Replace the RPM sensor if the door only moves a short distance and the learn light flashes 5 times.
Replace the garage door opener belt
The motor pulley drives the belt to move the trolley along the rail to lift and lower the garage door. If the belt frays or breaks, replace it.
Replace the garage door opener chain and cable assembly
The sprocket on the motor unit drives the chain and cable assembly. The cable is attached to the trolley that lifts and lowers the garage door. If the chain or the cable is damaged, replace it.
Replace the garage door opener DC motor
The DC motor rotates the pulley which drives the belt to move the door. Replace the motor if it doesn't run when you activate the garage door opener.
Replace the garage door opener AC motor
The AC motor drives the gears that rotate the sprocket which moves the chain to raise and lower the door. Replace the motor if it doesn't run when you activate the garage door opener.
Program the vehicle's garage door opener remote
Special programming is sometimes needed to link a vehicle's built-in remote control to the garage door opener. First follow the steps in the vehicle's owner's manual for clearing any existing codes and programming, Software updates for the system are occasionally required to correct incompatibility. Contact the manufacturer of the garage door opener for help with resolving this type of problem.
Repair or replace external garage door opener wiring
External wiring connects the wall-mounted door control and the safety sensor to the motor unit of the garage door opener. That wiring can become damaged or disconnected. Check that wires are securely attached to the sensor's photoelectric eyes (each eye has 2 wires) and the wall unit. If any wire is cut, strip insulation from the end of the wire and reattach it. Check that wires are still attached to the terminals on the back of the motor unit. Replace or repair any frayed, pinched, or exposed wires.
Find and remove garage door opener RF interference source
When the garage door opener works intermittently, the logic board may be experiencing radio frequency (RF) interference from nearby sources such as security lights, ham radios and some electronics. If the remote works only when held within a few feet of the motor unit, RF interference is probably the problem. Locate and eliminate the source of the RF interference. To determine the source, disconnect electrical power to suspected sources, one by one.
Adjust and align the garage door opener
When the garage door opener doesn't work operate properly, check the alignment of the motor unit and/or the rail and realign if necessary. If necessary, adjust the settings for travel limits and force limits, following the instructions in the owner's manual. make sure that the photoelectric eyes of the safety sensor are aligned.