Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1

I've been having an issue for quite some time now that's been getting worse. The door would sometimes start to close, then reverse as if the safety sensor was tripped though it wasn't. Would happen at certain times of the day as well, when the sun was hitting the garage. I could never see the little green light go out or anything, so really thought it was something else but these are too inexpensive not to try. Been installed and working for about 2 weeks now and the door hasn't stopped/reversed a single time since. Installation was easy with these. Used the existing brackets and I didn't have to do anything extraordinary to get them aligned. Wire was a little tough to separate in order to strip. I had to use a knife to cut down the center to get them apart. Minor inconvenience though. The included connectors worked fine, and there was an extra just in case. I like how bright the LEDs are on these, there's no issue telling if the senor is being tripped or not. Very bright and large.

I was having intermittent issues with my Jackshaft Liftmaster garage door opener not being able to close. When I tried to close it, it would move a couple of inches, but it would reverse since the old safety sensors erroneously thought there was an obstruction. I contacted my garage door guy who installed it 13 years ago and he suggested replacing the safety sensors as a possible solution. This was the easiest, cheapest, and most cost-effective repair to try. My existing safety sensors did not give me any indication of failure like blinking lights. I would never have suspected that the safety sensors was the problem. These safety sensors are a little smaller than my old ones, but these worked just fine and are perfect replacements. I was able to use the existing mounting hardware, so installation was super easy. Just splice the matching-colored wires and adjust the sensors so they are aligned. All the parts that you need are included, even the wire connectors. They even provided an extra wire connector that I needed because I didn't crimp one of the connectors properly. It took me less than 45 minutes even with clean up, but I am sure others can do in 15 to 30 minutes. I took my time, since I didn't want to make any mistakes. If I called a professional to do the replacement, the sensor would have cost me $75 and the service call and labor would have been about $150 or so. Beware of unscrupulous garage door companies who want you to spend thousands of dollars on a garage door refresh (replacing all the hardware of the garage door like rollers, cables, spools, springs, etc.) and/or replacing the garage door opener itself that isn't needed. I am lucky to have an honest garage door installer that helped and saved me money. I asked him if I needed to replace any hardware and he said no, unless I just wanted to spend money. This is definitely an easy DIY project which saves you a lot of money for something that is so easy to do. I expect these sensors to be durable and last me over ten years like my old ones.

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!

Easy install and has been working perfectly for a couple months now!

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.

These are great! My old c. 2012 garage door sensors were so sun-sensitive that we couldn't close the door in the afternoons except during winter or a very cloudy day. These new/improved sensors work like a charm. The LED indicators are much more visible and make alignment easier, too. My only complaint is that the box came with no installation instructions.

I am a single mom and got these to deal with my garage door constantly bouncing back up when the sun was out. They worked! My house is about 16 years old. I found that these sensors were easy to replace and worked with my aging Liftmaster garage door opener. I’m going to replace my second door’s sensors now also.

Have a Chamberlain garage door opener for 10 or so years and in the past year I’ve noticed I wouldn’t be able to close the garage door when there was sun hitting my sensors. Never thought this was a problem but some sort of “fact of life”. This became a security concern as I’d have to leave the house with an inability to close the door. Fast forward to a month ago, I started googling this which led me to some reviews that started changing out the sensors would fix my sunlight issues. Ate some research on Amazon, I find these highly rated sensors that are compatible with Chamberlains and ordered it. It was very easy to install. As others have said, I unplugged the garage opener first, cut the wires to remove the old sensors and pigtailed the new ones on. I will say I did have problems with the push wire connectors that came with it. Some wouldn’t solidly hold the wires in, so I had to use my own wire connectors. But a big deal. So far it’s worked out well, closing when direct sunlight is in the sensors. I couldn’t believe I let myself live with this problem for a year. I will want to test this when the sunlight is more intense during summer to really know if my problem is solved. If I have any issues with this then, I’ll update my review accordingly.

Los sensores anteriores ya no funcionaban correctamente, decidí cambiarlos por estos, tengo motor chamberlain y funcionaron excelente, muy fácil la instalación sin necesidad de contratar técnico.

Works with my Liftmaster garage door opener. The included wire clips were helpful for attaching new sensors’ wires to the original wires from the old sensors. The LED indicators on each sensor are bright and easy to see.

Facilidad de instalación y buena calidad de producto para mi motor Chamberlain

Installs onto existing wire. Will require wire strippers for the install. Package provides 4 (+1 extra) crimp connectors for making the connection between the new sensors and the old cables. Old sensors were having some issues (backing up when nothing was there, not stopping when something was actually blocking the sensor). These seem to be more sensitive and accurate than the older sensors. I did not bother changing the mounting hardware and used the existing ones on the track. New LED indicators are much brighter and larger.

Reparé ma porte de garage qui bloquait à cause de sensors défectueux en quelques minutes. Mon ouvre porte de garage Mastercraft date de plus de 25 ans. Juste besoin d'une paire de ciseaux pour couper les fils des vieux détecteurs et y connecter les nouveaux avec les connecteurs inclus. J'ai même laissé les vieux en place et installé les nouveaux juste par dessus grâce aux supports inclus. Les lumières sont beaucoup plus visibles que les vieux et ainsi très facile de voir quand il sont bien enlignés. Le vert cesse de clignoter quand l'enlignement est parfait.