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

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Opener on wall will not work after power outage

My wall opener will not work after a recent power outage, the green light on it is flashing fast. Any Suggestions.

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Actually it sounds like the vacation lock has been enabled. To turn it off press and hold the lock button for 2 seconds and test it out. If this is not it then you will need to replace the logic board and get a surge protector as well. Thanks BB

Posted on Sep 05, 2010

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Hello!WE had recent power outage ,now door opener won't work.unit has power lights come on when remote pad pressed,but nodoor action?thank you


Along with the power outage you probably also had a power surge. You need to pull the logic board and check the printed circuit board for burnt or missing traces. Unplug the unit first.

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The green light flashing 4 times is sending the code for " Safety reversing sensorsslightly misaligned (dim or flashing LED)". These are the sensors in the doorway. Tweak them a bit.

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I would first of all unplug the opener for at least 15 minutes and see if it doesn't reset. If not, pull the logic board and check for burnt or missing traces on the printed circuit board.

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To answer your question the opener is in vacation mode. Press and hold for 3 seconds the button on your wall control with the lock icon. The green light will stop flashing and you will be back in business.

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

1 Answer

Green light flashing and opener button does not work


It sounds like your wall control is bad. Remove it from the wall and then remove the two wires on the back. Remember which wire goes where as they are color coded.

Aug 11, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

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a component in the wall unit is failing , that makes the conection happen when the remote signal is recieved , ( it is recieving the remote signal but not sending it out to the control circuit for the motor )

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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The unit is in the lock mode, push and hold the lock button in for about two seconds and the green LED should stop flashing. Your remotes should work.

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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do you have the sensors at the bottom of the door? if so they might be out of alignment. all you have to do line them up by getting the green light solid. let me know if this helps you.

Dec 18, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Light flashing and control won't work


Your opener has been hit by lightning or power surge.
If it's not too old you can replace the 'back board' (the computer board on the back of the opener.) Also If the opener has safety sensors one or both of them may be burnt out too, and if it was really bad then the rpm sensor will go too. So you could be looking at paying half the cost to repair or just get a new opener. Up to you, and get a surge protector. Lift master has a good line of products and makes thier own surge protectors for thier products.

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