Chamberlain 820CB 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!

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.

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.

Similar situation as others here. My original sensors went bad a few years ago so I replaced them with the cheaper ($15 pair) “compatible” sensors. Less than a year, the new sensors started acting up and not closing when the sun was out. Then within 2 years the sensors would intermittently stop working in the dark. I would stand there watching and the green light stayed on the entire time but the door would stop and go back up. Finally fed up, I came back here and starting reading reviews and learned that the more expensive Chamberlain brand was much more reliable. I bought and installed these and they work perfectly, no more issues even in direct sunlight.

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.

My garage door stopping closing when the outside temps got colder, so research led me to replacing the sensors. I checked the opener's manufacturing date, and it was 2005, so I then checked reviews for that version of the sensors and didn't see much difference in ratings or performance for the cheaper generic ones so that is what I first bought. Turns out that the previous homeowner replaced the opener in 2005 but reused the older pre-1997 sensors! Different size and connection and everything. But when the generic ones arrived, I thought let's try 'em and see. Massive logistics issues - no way to mount the new sensor brackets at 6 inches or lower due to 8" concrete foundation, and they didn't fit in the older and larger existing brackets which were firmed drilled into said concrete foundation. I got the new ones installed in the new brackets at 10" height above floor but had the receiving sensor on the sunlight side, so I switched them. They never hooked up and the light indicating power and version was so small and dim that it was a frustrating experience. Next step was to try these sensors designed for this 2005 opener. Best decision ever. These Chamberlain sensors (our opener is a Liftmaster) are smaller than the generic ones but were much easier to install on the newer brackets that came with them, and much easier to align. Having 24" of wiring instead of 16" helped in that regard. But the two keys for me were the fact that the receiving sensor (green light) was clearly labeled, and once installed those larger brighter colored lights were a Godsend in a dark garage. These are well worth the extra money compared to the cheaper generic ones, and if you are a DIY type who gets easily frustrated then you definitely need these.

I’ve owned my home for 12 years. For the first 6 or so, the garage door opener worked just fine. Then, it started not closing when the sun was really bright, then when the sun was out at all, and finally, it stopped working altogether. I tried all the things — readjusting the sensors, cleaning the lenses, even toilet paper rolls on the sensors to block glare. Nothing worked. What followed was several years of having to have someone inside the house hold down the garage door button it would over-ride the sensors. We essentially didn’t have a garage door opener. Finally, after procrastinating for probably 3 years, I bought this set of replacement sensors. I had a little bit of experience with wiring as I’d worked my basement when I finished it a couple years back, so I had a good set of electrical pliers, and was comfortable splicing wires. It took about 20 minutes to clip off the two old sensors (they were hard wired) and splice the new sensors using the provided connectors. I probably left too much wire, but who cares. No one is going to see it. Once everything was connected I clicked the button on one of my remotes, and for the first time in years, the garage door closed in the light of day! I cannot overstate how liberating it is to actually have a garage door opener that opens! And with how easy the repair was, I should have done this years ago!

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.