Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Mine does the same thing...

Both sensor lights (one green & one Orange are working.
The door won't shut unless I hold the main switch until it is completely closed. The remotes do not work to close the door...just the main button.
I've tried EVERYTHING from lube to alignments...nothing is working.
I get the same light blinks 3 or 4 times after the door fails to shut and retracts back open.
CAN ANYONE HELP!!!

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If the main light is flashing 10 times you have a door sensor problem. Might be the wiring to the sensors. Nothing else will cause this flashing of the main light.

Posted on Jul 12, 2009

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To my knowledge, the opener will not work without the sensors. They are there for the safety of anyone or pet that might wander under the door while it is in motion. They also will stop the door if there is an object in the path - if it is more than 6" in height.

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Try moving the sensor up/down or forward and back unitl the light comes on. Check both sensors. I've often seen them get out of alignment if someone bumps into them when trying to walk out the door around a vehicle. If you still don't get the circuit, check if the control wires are undamaged and properly connected to the opened. These are usually the white and white/black wires and could be damaged at the staples that keep the wires against the wall and ceiling.

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The colour on the sensors doesn't change.
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