CHAMBERLAIN820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1

I had new garage doors installed about 3-4 years ago and they functioned perfectly (including the safety sensors) from day one. Unfortunately, we recently starting having problems with the garage doors closing in the later afternoon (North facing driveway). It was pretty clear that the sun was shining directly into the safety sensors which caused the lift motor to reverse. This was a major problem as I have a few kids who are great on their iPhones but not so great when it comes to more "complicated" home problems (i.e. running a dishwasher, washing machine, lawn mower, and garage doors). It is really frustrating to be at work and have a kid call to say they can't get the garage doors to close. It is even more frustrating to try to explain how to solve the problem to the helpless teenagers.....Enough said. Time to solve the problem.I did lots of internet research and found all kinds of hokey solutions (i.e. toilet paper roll, black plastic sun shades, etc...) but none of those seemed reliable enough to protect me from the dreaded call from the teenagers so I looked into the problem further and it appears that long-term exposure to sunlight can cause the older generation of photoelectric safety sensors to deteriorate. I decided to replace the old sensors with these hoping it would solve the problem. Good news! They did!I do have a couple of tips that might help with the install if you choose to replace your old sensors with these. First, I used a black permanent marker to mark the top location of the brackets for the old sensors. I then removed the old brackets and installed the new brackets with the new sensors as a complete assembly with the top of the new bracket at the marked line. That is much easier than installing the new bracket and then installing the new sensor (you do need to use the new bracket as the sensors are shaped differently).Next, I pre-wound some of the excess wire around a pen to create a little buffer in case I needed to move the new sensor up or down. It is only possible to do this easily if you do it before the wires from the sensor are connected to the wires from the garage door motor. I now had a buffer that would allow vertical movement if my marks were off.Finally, I cut the old sensor out one wire at a time so that I did not have to unplug the garage door motor itself. If you cut one wire at a time, you cannot create a short which might damage the garage door motor and unplugging the motor itself is an unnecessary extra step. The connectors that are included with the new sensors were perfect and easily secured with a simple pliers so all good!Once the install and electrical connections were complete, it was easy to verify the sensors were properly aligned. One sensor has an amber light and the other has a green light. It does not appear to matter how you install them. Both lights are constantly on when things are properly aligned and they flash if there is a problem so easy to verify the install. Mine turned out to be correct so I went on to test the up/down performance at the same time of day when we usually have trouble. Everything worked perfectly and I no longer have problems with the sunlight causing the garage doors to reverse!These turned out to be a simple solution to a frustrating problem. I highly recommend the kit if you are having similar problems with your garage doors auto reversing due to sunlight!

Works great! Going through my amazon history and thought these should rate a review...Replaced my old garage door sensors about 5 years ago with these and they've worked great ever since! Easy to install, direct replacement. Solid purchase. Good price!

Used this 820CB to replace 801CB on my LiftMaster MyQ.Worked awesome!In a pinch and everything I needed came quick!Thank you logistic geniuses and MyQ designers!

My previous sensors failed and needed a replacement. Super simple to install and worked flawlessly. No reprogramming. I love that they have indicator lights showing when there is a connection between the two sensors. Made aligning them 5-second job.

I had the older sensors and had issues with sunlight keeping my garage door from shutting. Replaced it with these and no more issues so far. The orange/green notficiation light is significantly brighter as well and makes it easier to see if something is blocking the laser.My only issue is that there was absolutely no instructions. It's pretty simple to install but some sort of guidance on how to install them would have helped. Also the cable connectors they have in the box are trash.

Moved into a new home and the previous owner told me the garage door would stick when it was cold and I had to hold down the garage close button.. once I moved in I quickly realized the sensors were no good. He had the old style sensors, so I got these and had them spliced in and mounted in about 10 minutes. Unfortunately I had to modify the brackets a bit to mount (bc of how the old ones were mounted). A few quick bends with a pair of pliers and these were up and running. First open and close were successful and a second test with a box in the way triggered the safety reverse, as they’re supposed to. Excellent product. I connected these to a chamberlain garage door opener.

Our garage door would not close save unless we held down the door close button in the garage or if I disconnected the garage door and manually closed it. After a quick Google search is when I determined this was due to the sensors not working. After a quick check that indeed the lights on both sensors would not come up I ordered this replacement. These are slightly smaller then the ones I had so i had to use the new mounting brackets.I did run into some issues, but not the fault of these sensors. While connecting the sensors I noticed that the lights would not come on. But then they would. I was not aware of this from the videos I saw, but after 5 the overhead light to my garage door opener would shut off but I had thought there was still power going to the sensors, but there wasn't. When I finally figured out the the problem I kept the garage door opener with me and would just use the button to turn the overhead garage door opener light back on which in turn activated the sensors and their lights. Would have had this hooked up much quicker if I had known that to begin with. So just in case someone else is having the same issue I thought I would bring this up.But the sensors work great! Though WOW the Green & Amber LEDs are much brighter then the ones that came with the opener. Definitely can see if this is anything now blocking the garage door.