Garage Door Opener: Won't open
If your garage door won't open when you click the remote or press the button on the wall control, first make sure the garage door door isn't locked. If the door ins't locked, pull the emergency release cord to check whether the door opens smoothly; fix the door tracks if the door binds when opening. If the door travels smoothly on the tracks, see if the door opener when you click the remote while standing close to the motor unit; if it does, radio signals from a nearby device could be creating interference. Finally, the problem could be with the logic board.
These repairs may help solve your Garage Door Opener problem:
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 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 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 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 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.
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.
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.
Do garage door opener preventive maintenance
To keep the garage door operating smoothly, periodically check the garage door opener for proper alignment and settings, following instructions in the owner's manual. Inspect hardware and lubricate moving components. Check the safety sensor for proper operation.
Replace the garage door opener travel limit switch
The setting of the travel limit switch determines how far the garage door opens and closes. If the motor keeps running when the door is fully closed or fully open, first adjust the travel limits, following the instructions in the owner's manual. If adjusting the travel limits doesn't correct the problem, replace the travel limit switch.
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.
Replace garage door opener brackets
Brackets fasten the garage door opener to the garage door. The brackets can wear out, break or be damaged. Physically inspect the brackets and other door hardware to see whether the components need to be replaced.