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

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We have a liftmaster 2280 opener it will work from both remote contrors but will not work from wall mounted one i jymped accrossed the 2 wires and it will still not respond. the light will not come on either. what could be my problem. thanks charlie

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  • charles_w_co Jan 14, 2009

    i do not want any e-mail from you for the (3) third time. i will not pay for any tech support. and by the way i contacted chamberlan and they souved my problem in 30 sec at no chargre. why would anyone pay you ?

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Please do not send me any more e-mails i am not going yo pay for tech support. i did not solve the problem. thanks for nothing

charlie ciik

Posted on Jan 11, 2009

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I have a liftmaster formula 1 1280R opener that works fine from the wall mount but all of a sudden both remotes and the built-in remote in my car stopped working. It is not the batteries in the remotes. ...


The motor/control unit may have gotten reset. It needs to relearn the codes transmitted by the remotes.

MIne has a "learn" button on the control unit. Press and hold, then press the button on the remote. Lights will flash indicating it has received and stored the code. Release button.

Check to see if the remote works now. If so, all three should be working. If not, dig up your manuals.

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My wall mounted opener/closer has stopped working. It is hard wired to the opener, not remote. This unit also has buttons forLock and Light. Thank you J B Ward


REMOVE THE UNIT FROM THE WALL AND DISCONNECT THE WIRES.

GO TO THE BACK OF THE POWERHEAD AND CONNECT IT DIRECT WITH SHORT WIRES (POLARITY IS IMPORTANT HERE) TO TEST IF THE UNIT NOW WORKS. IF IT WORKS REPLACE THE EXISTING WIRES - THEY MAY BE SMASHED WITHIN THE WALL OR UNDER A STAPLE THAT IS TOO TIGHT.

IF THE ABOVE TEST DOES NOT WORK REPLACE THE WALL CONTROL UNIT.

HOPE THIS HELPS

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1 Answer

I have a Liftmaster garage door opener & remote. The remote began to work only intermittently. I replaced the battery (I didn't reprogram remote when battery was changed & remote worked for a...


COULD BE A BAD REMOTE, I WOULD TRY ANOTHER ONE FIRST.


COULD BE A FREEZER ETC. PUTTING OUT INTERFERENCE.


OR


Anytime a door opens and/or closes randomly or doesn't work consistently I look for a smashed wire between the motor unit and the wall button.


If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door or interfere with the remote signal.


Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.


The second thing would be a bad wall button or a remote with a sticking button.

Or a remote in someone

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The most likely problem here is that your wall control is bad. I would disconnect the 2 wires going to it and I think you will find your remote works. Replace the wall control.

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Your wall control is hard wired and doesn't use the receiver portion of the logic board. The remotes do. Your receiver is going bad.

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Check the wiring going to the sensors to make sure it is not broken or disconnected. You have a problem with the sensors themselves or the logic board. Unfortunately the only way to be sure is to replace.

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1 Answer

Wall mount not opening door. Looks like its not getting power.


You may have disturbed the wiring leading to the wall control. It connects to terminals 1 and 2 on the rear of the motor unit. The wires are color coded and must be connected correctly. The solid white wire goes to terminal 2 and the white wire with red tracing goes to terminal 1.

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1 Answer

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Check wiring back to unit to make sure it's not shorted or broken. You can also reset the garage door opener by unplugging it for a few minutes and plugging it back in.

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