Question about Chamberlain 3/4-HP Whisper Drive Plus Evercharge Standby Garage Access System

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Garage door won't go down all the way and then reverses to open

The saftey reversing sensors appear to be installed correctly and wired correctly according to all the troubleshooting instructions. Both sensors have a steady LED light that is always lit up. So, when I go to close the door, it won't go all the way down. Sometimes it only moves 3"...other times it will almost touch the floor...but everytime, it reverses itself all of a sudden. There is nothing in the path either. But when I do put something in the way of the sensors, it instantly shows an "obstructed path" message on the Door Control screen.

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Check that the wheels and bearings are turning freely and that the door is not cocking to one side when closing. If the wheels are catching because of bad bearings, because the tracks are out of true or because the door is not staying straight in the tracks, the motor thinks that the door is hitting a car or a person and reverses. One thing to try: disengage the motor and try moving the door through the full traverse. Most automatic doors have a pull-cord that disengages the door from the motor. CAUTION: You may need a friend to help with the door, because it could be surprisingly heavy,.

Posted on May 01, 2017


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Posted on Jan 02, 2017

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SOURCE: My garage door attempts to close then stops and auto reverses. If I pull the release and manually push the door down halfway then press the opener, the trolley will make a full pass without any auto r

Look at the sensitivity adjustment, your description sounds like it is set too sensitive. This is the close sensor.

Posted on Apr 16, 2012

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SOURCE: I have a 1/2 hp crftsman 41A4315 garage door opener. I changed the gear and now it won't close all the way. It started going down and reverse back up

your chain is in the wrong position, unhook the chain and run the door opener so it is in the down position, then reattach the chain and make the adjustments as needed on the up and down screwes located on the side of the unit. good lick

Posted on Jun 21, 2012

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Opener reverses on the down cycle but the sensors are properly alligned.

If the main light flashes 10 times when the door reverses it is a door sensor problem. If the main light doesn't flash it could be something as simple as the down force needing to be increased a bit. This control is on the rear of the motor unit near where all those white wires go. You may have a bad RPM sensor board which is a printed circuit board just in front of the motor.

Apr 18, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door closes hits the floor and reverses. It appears that the door has a sensor or something that causes the door to reverse once it hits the garage floor. What would cause this problem? The eyes are lined...

Garage doors have a setting that will do this. The door is traveling too far down and when it hits the floor, it thinks it is hitting something. There should be adustment knobs on the back of the unit to solve this. Good luck!

Nov 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door move a foot, then reverses and light flicks

If the main light flashes 10 times when the door reverses it is a door sensor problem. Each of them has a small light that is on when the sensors are properly aligned. Make sure they are on. If not tweak the sensors to align them. If the light still doesn't come on you have either a bad sensor or the wiring going to them.

Aug 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Left Sensor has yellow led & right sensor is green. Garage closes and then immediately opens. I'm assuming it's the sensor with the yellow led. How do I fix this?

If the main light flashes 10 times when the door reverses it is a sensor problem. Make sure the door isn't hitting the floor and then reversing. This problem will not cause the light to flash 10 times and can be corrected by adjusting the 'down limit' which is on the side of the motor unit.

Jul 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door goes down about one foot and then reverses and stops in the

Check this it may be your problem.

Sep 19, 2017 | Sears Craftsman LiftMaster Chamberlain...

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