There may be another sensor near the motor that tells the unit how far to let the garage door go down.
Garage door will go up but not down.
If it remains your garage door is well balanced and can be moved by the garage door opener.
Check for reversed broken or cut wires.
Now lift the garage door to the ceiling.
Look for two screws on the motor base.
It goes partway down reverses direction and goes back up again.
This could include small items like rocks gum or mud buildup.
If this is set too short your garage door may not shut all the way or it may slam hard on the ground and go back up.
If the door goes up but you can t make it go down you probably need to adjust the sensors.
If you find that your garage door closes part way and then goes back up this can be triggered by objects on the ground blocking their path such as garbage cans or toys.
It could also be caused by a buildup of debris on the tracks that prevents the rollers from moving forward.
If you re in the habit of leaving the garage door open a variety of things including.
Staples can cut insulation and short out the wires.
If the garage door doesn t stay in place call a garage door technician to fix the problem for you.
Replace the wiring if needed with garage door opener wiring.
Now if your garage door still won t go down after you ve made sure the sensors are properly aligned and there s no obstructions you ll want to take a damp cloth and wipe down the lenses of the sensors.
Step by step procedures to try if the garage door of your home will not go down without holding the button before calling a repair man was this video helpful.
By wade shaddy updated december 19 2018 you push the button to close the garage door.
One will identify downward and one upward.
How to fix a garage door that won t go all the way down safety sensors.
For series ii wall console you can remove the wires from the back of the wall console and touch them together to see if the garage door moves.