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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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I can open the door with remote and wall button, But will not close with remote. I have to hold down the wall button to close. I replaced the sensors because one was bad, but didn't help.


Make sure your sensor are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If your cannot get both lights to come on you have a bad sensor or the wiring to them is bad. Maybe not connected properly. The solid white wire from each sensor goes to terminal #2 and the white wires with black traces go to terminal #3.

Nov 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

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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