I have a Sears HBW0777 opener that still works despite blocking the photo eye sensors. The lights stay green even when blocked. Tried to realign, no change. One of the lights just dims a little when blocked. It's an oldie but a goodie. I installed it about 14yrs. ago. I wouldn't worry so much about this but I have young children. Thanks for any input!
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Might work. Might not. Depending if the eye can sense light and dark from that position. If area is shaded, then the sensor might think it's dark earlier in evening. If the area is dark, then sensor will not do as well, or might stay ON full time. If the outdoor light shines on nearby surface, the reflected light might cause photo eye to blink on-off throughout night.. or not function as expected. You can add separate photo eye to any light, and choose location for photo eye. http://waterheatertimer.org/How-to-install-and-troubleshoot-photo-eye.html Add a comment and say what you discover, or for followup wiring question.
Very strange they both have the same exact problem. I would suspect something with the brackets is changing. When you are having this problem and the light on the receiver unit is not lit, tweak them a bit and see if it comes on. The odds of the logic board in both openers having the same thermal problem is just too high.
One photo eye should be yellow and the other one green. The problem seems to be your down limit to be set too far. When you stand facing the door behind the operator the limit adjustments should be on the left hand side under the light cover. The down limit is the one closest to the door.
this probably means you have a bad photo eye if you happen to have to doors side by side may be picking up on other sides photo eye just switch sides from left to right, however if the lights are coming on but does not mean that photo eye is not bad it has a small circuit board inside of it...
Some craftman operator don't have that feature. Are both photo eye lights green? Feature not available. If the photo eyes are yellow and green feature should be avilable. The operator needs to have a three button wall station. With the light on the operator off press and hold the "light" button for about a minute until the light flashes.
I assume you have a Craftsman or Liftmaster operator and you are talking about the photo eyes (sensors). If this is true thanone light will remain on if there is power to it and the other will go out when the photo eye beam is blocked or are not lined up.
Thank you for your your question bry4man. I look forward to answering any more of your questions.
You have a photo eye (sensor) issue as you suspected. Be sure both green lights are on. If one is flashing or is off, the photo eyes need to be realigned or there may be a wire shorting out (check for staples in the wire) to the photo eyes. Sunlight can also be an issue. The photo eyes might have to be moved away from the opening to be out of the sunlight.
Make sure to clean off the lens so there's nothing blocking signal and make sure that theres no obstructions in the way of the photo cells before and during cycle. make sure that you have power going to them by having the Amber or red light displayed at all times and make sure that the green light is present for alignment. If it works for a couple of cycles and then goes back to being non active, make sure that the tracks or the surface that sensors are mounted to are not moving as door is in operation therefore they will move out of alignment during or after a cycle and will not allowed to operate! Make sure that none of the wires going to the cells are punctured through by any Staples! sometimes it could happen and when you move the cell around it could relocate from the staple and go back to norm, then after cycle it could short out from vibration which will send wire back to hitting stable! If none of these are helpful and you want a quick fix go down to your local home improvement store and buy a set of photo cell/safety cells and wire them up as diagram displays which is very simple and easy.