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

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.

Excellent replacement sensors. Better than the originals, these have been drowned multiple times and they are still kicking with absolutely no issue. They were very easy to install, just splice them in where the old ones were and the door opens and closes easy as pie. Worth every penny.

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.

Our garage door opener was acting up, yet everything checked out okay. No matter what I adjusted, including the photo-sensors, sometimes it would not close. After exhaustive testing, the only thing it could be was the photo-sensors, although their little yellow and green lights appeared to function. With nothing else it cold be, I bought these replacements. They arrived quickly and installed exactly as the old ones. The garage door now works properly every time! I can only conclude that the old sensors were on the verge of not working. Okay, 3 or 4-stars should be average, which these are. But, because of the low price, I'm bumping them up to five. Hot tip: if your garage door sensors are going bad, but not burnt out, you can't just remove them and go without. The garage door opener insists on these being connected or it won't work. Until the replacements arrived, I taped the two old ones touching and facing each other on a strip of wood, then placing them atop the opener, I wired them in. So, the door worked fine. For safety sake, I backed off on the sensor that controls the down force to the point where even a soft item would reverse the garage door on impact.

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!