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I had removed 3 of my 4 door sensors. Now I can no longer get them to work properly. At this point I dod't even know which one goes to which door.

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Door goes all the way down, stops and then goes up again.


The problem is probably the opener safety sensors. Inspect the photo-eye sensor. The sensors are the small black boxes the near the bottom of your garage door frame which are usually installed on the tracks with a small bracket.
When the infra-red sensors are malfunctioning, usually one of the sensor lights will be blinking. The problem is either due to a blocked path between the sensors, dirty eyes, loose wires at the sensors or at the motor head, or just bad sensors. The transmitters (remotes) will not work to close the garage door. You will find that the door will only move an inch or so in the close direction and reverse. When this happens your garage door will only close by holding down on the wall button, or wall console, until the door fully closes. This method is the only way to override the safety and close the door.
1. Make sure that there is not something blocking the sensors from communicating with each other and the wire connections are securely fastened at the sensors and motor head, and the eyes are directed at each other. A lot of the time dust, spiderwebs, or even a small toy can block the sensors. If there is anything blocking the sensor remove it and try your door again.
2. If there is nothing blocking the sensors they maybe misaligned. They need to be pointed at each other in-order for they to work . If they are try to push alignment sensor into alignment. You will know they are aligned when the light stops blinking on the sensor.
3. Also, try unplugging the garage door opener and re-plugging the unit back into the outlet. This acts as a reset and may reset the sensors. If nothing works, it may be that you have to replace the sensors.

Jul 24, 2017 | Building Materials

1 Answer

Need help with craftsman 315 opener. this is a new install and the safety sensors are not working properly. even when they are not aligned properly, both the green and amber lites are lit solid,should...


Check to make sure you have them properly connected at the motor. The solid white wire from each sensor goes to terminal 2 and the wires with the black tracer go to terminal 3.

Jan 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door goes down 3/4 way down then goes back up and flashes 10 times


Your door sensors have probably been bumped and are misaligned. They must be pointing at one another to work properly. Each of them has a small light that should be lit. If you cannot get both lights on the sensor to come on you probably have a sensor that has quit working.

Oct 28, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Remote opens door but will not close door (Liftmaster)


If when you try to close the door with the remote the main light flashes 10 times and the door reverses to the open position you have a door sensor problem. Usually it is because one of them has been bumped and is no longer pointed at the other one. If they are pointed properly they will each have a small light that is lit and not flickering. Tweak them a bit. If this doesn't work and the lights are not on you most likely have bad sensors.

Oct 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door won't stay closed, then opens only partially.


If the main light flashes 10 times when the door reverses it is a door sensor problem. Each sensor has a small light that must be on and not blinking for them to work properly. If one of them is not on tweak them a bit to make sure they are pointed at one another.

The stopping about 1/3 of the way up is either a broken door spring, a main drive gear that is going bad or an adjustment to the 'up force'. The 'up force' control is on the back of the motor unit near where all those white wires go. Increase it a bit. It will sometimes compensate for a gear that is going bad but if this is the case it will start doing the same thing soon.

Oct 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

When i try to close garage with transmitter or keypad it moves a few inches and stops or goes back up


If the main light flashes 10 times when the door reverses it is a door sensor problem. Make sure the small light on each sensor is lit and not blinking. The sensors must be pointed at one another to work properly. If you cannot get both lights to come on you have a bad sensor.

Oct 08, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opens, and light flashes several times


Your door sensor have either been bumped so that they are no longer pointing at one another or have gone bad. Each of them has a small light that should be lit when they are properly aligned. Tweak them a bit. If the light doesn't come on you have bad sensors.

Sep 25, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Chevy uplander sliding door sensor will not stop


Remove the PSD fuse, its on the inside fuse panel

Sep 17, 2009 | 2002 Chevrolet Uplander

1 Answer

I have a sears craftmen garage door and the control switch on the wall light keeps flashing and I need to know how to get it toa solid light and when I press the button to close the door it goes few...


When the door reverses to the open position and the main light flashes 10 times it is a door sensor problem. Usually the sensors get bumped and need to be tweaked so that they are once again pointed at one another. Each sensor has a small light that must be on for them to work. The light on one sensor stays lit all the time and the other sensor light is only on when they are pointed at one another.

The flashing light in your wall control is a separate problem. One of the buttons on the wall control has an icon of a lock. Press and hold it for 3 seconds and release. It should stop flashing.

Jun 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door sensor light on one is green the other yellow. When they are lined up one stays yellow and one is green. When I point the yellow sensor away from the other one the green goes off. Do you think...


They are doing what they are designed to do. To work properly they must be pointed at one another and to tell when they are aligned the light on the receiving unit turns on.

Jun 07, 2009 | Sears Craftsman LiftMaster Chamberlain...

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