Questions & Answers for: liftmaster door sensors

...GDO goes up, not down 1/2 HP Lift-Master GDO. No recent gear replacement or adjustments. Door started to fail to go down. Adjusted down sensor to max, no effect. Electric eye operation is ...

...door goes back up. I've fiddled with the sensors, but if they are out of alignment, I can't seem to get them back into alignment. Is there possibly something else at hand as well? If the main light ...

...Door seams to think that something is in front of the sensors. sensors are not blocked and are alined. Sensor was pulsating Try and disconnect the sensor from the opener and see if it works. If so, ...

sensors. What else can I do? IF THE DOOR CLOSES FULLY WHEN YOU HOLD DOWN THE WALL BUTTON AND NOT IF YOU PRESS AND RELEASE THIS DEFINATLY MEANS THE EYES ARE THE PROBLEM. BE SURE THE SENSORS ARE MOUNTED

...the beam, door reverses and opens. Work the sensors so that they are both aimed perfectly at each other. I believe that the amber light will change to a different color when the sensors are

...colors are correct. Try wiping the little eye sensors that point at each other for one thing and make sure there isn't something protruding from door that's coming into the patty of electric

...on how to replace garage door sensors I found on YouTube: https://www.youtube.com/watch?v=crTTxmUm6Vo You will see links to similar instructive YouTube videos along the right side bar. Best

sensors eye ball to eye ball looking for the unlit sensor to light. If the unlit sensor still won't light then there is a broken or pinched wires some where between the unlit sensor and the garage

...door frame. Make sure both sensors led lights are lit. If not they are out of alignment and you will have to loosen the wing nut on the sensor that is lit and move it, trying to get the other sensor ...

We have a liftmaster pro9000 and the garage door will not open very far. How do I adjust the sensor? Can I adjust the sensor so that the door opens fully? I think the sensor is wrongly sensing a car ...