Diagnosing garage door sensor problem from technical viewpoint.

In this video I use a wiring diagram to show how garage door beam sensors work and how to determine if your problem is a wiring, component, or aiming issue. A typical symptom is that the door opener will open the door, but not close it because a malfunctioning sensor circuit mimics an obstruction to the door path. As a stopgap measure, you can sometimes press and hold the wired controller to override the sensor and close the door.

[@arniecummings983]

Your simple wiring diagram was the key to enabling me to understand, diagnose, and repair a wiring problem, which was essentially disconnected sensor wires in a jumble. That diagram was flashed quickly at the beginning of the video, so I had to take a screenshot to have time to adequately digest it. Your simple diagram was far better than more complicated ones in other installation and troubleshooting instructions. As complicated as it needs to be, but as simple as it can be. Well done!

[@thepar7575]

One of the best summaries on diagnosing the sensors. Simple and understanding.

[@BetaBuxDelux]

Awesome work - my sensor is bad - your video helped me out! Thank goodness there are videos like this for those of us without dads to explain this stuff.

[@ericharnish4792]

Thanks for posting! This is the video that helped me diagnose the issue: Bad sensor. Popped in a new set and we're up and running! The wiring diagram was clutch. Much appreciated!

[@TheSupertramp11]

Very good video explaining the possible low voltage issues one may have with garage door sensors. Thanks!

[@dancindavey1515]

Great explanation and simple diagram. Think you solved my dilemma. Thanks! This is how how- to videos should be done for novices. And thanks for answering all the questions. One of them kept me from making a mistake of using ac instead of dc.

[@ccbest21]

Just watched this and it was very helpful in diagnosing the problem. So I traced the wire to the pinched section and cut it there. It wasn’t too far from the end thank goodness and re-spliced the wires and now it’s working thank you

[@vinceteti1216]

Awesome explanation, I had no light on either sensor. I thought the sensors were bad. After doing the test you suggested I was able to diagnose the wiring was bad. Thank you.

[@markchidichimo7761]

Thanks for taking the time to make this.

[@osvaldoorellana1584]

Thank you so much you saved me hundred of dollars in repair!

[@MethodOverRide]

Exactly what I was looking for, thank you.

[@zuluhours]

Great explanation. Nice & simple 👌

[@moi28642864]

Thank you so much for the video my sensor harness turn out to be 2.7 volts but the red one did not light up so I went to lowes bought new ones and now we’re back on business Genie sensors

[@quaisoncrosby-4p1sab36]

This was extremely helpul!!

[@pinoyautomotogpsmaster220]

WONDERFUL VIDEO PRESENTATION

[@daviddunning4518]

Thank you Todd

[@JosueDQ77]

Thank you for this video. I can diagnose that my sensor is bad since the voltage is present.

[@TheWilliedoyle]

good lesson

[@damonmcelvain4941]

Everyone else deals with blinking. Thanks for video on no light.

[@Jpeezy65]

thanks man, you saved me a bunch of time