Questions & Answers for: liftmaster ir sensor

...IR beam appeared to be not too narrow. Finally, I traced the problem to the intermittent connection problem in the wire to the sensor receiver unit (green LED). I replaced the wire section from the ...

...IR sensor slightly misaligned (dim or flashing sensor LED) Motor overheated/Possible RPM sensor failure -- unplug to reset Motor circuit failure -- replace RX/LX board Liftmaster transmitter with the ...

door will not go down. 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

...HAVE AN ALIGNMENT PROBLEM. BE SURE TO CHECK POLARITY AND CONNECTIONS ON BOTH SENSORS. YOU CAN TAKE WIRE AND RUN IT DIRRECT TO EACH SENSOR IF YOU THINK TH PROBLEM MAY BE A BAD WIRE. HOPE THIS ...

...must be held and released when the door hits the floor. Make sure there is nothing tripping the IR beam at the bottom of the door. The beam is bounced back and forth between its source and a ...

Door will go down until it gets close to the sensors (transmitters) and then it hesitates and goes back up. One of the sensors has a constant green light which tells me that it works properly, but the

I have the chamberlain garage door opener. the door will not shut. the door travels to about 8 inches above the floor and then reopens. the door is just over one year old and has worked well up until ...

My husband tried to "futz with" the sensors with no luck. So, we finally called the garage door repair card (the previous resident of the home left the business card for the garage door repair company

How do I realign the sensors? Both sensors will have their green led lights lit (on) when aligned. When not aligned only one sensor will be lit. Make sure both sensors' lens are clean. If still ...

...IR sensor are sensing an obstruction while the door is closing OR if the IR sensors are defective. As a first option, check to see if any object is stuck to the door (possibly low down) that is ...