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

4 Answers

Chamberlain 1/2 HP door opener will not work (102 1499A))

Door will open about 6 inches and then stop and motor just hums. Same with close. If you pull or push with motor then will open and close -- but considerable force required and every little bit either way, will stop unless manual assistance is continued. Disengage and opens and closes fairly easily. 3 flashes of the light whenever it stops and starts to hum -- after about 5 seconds, the motor will simply stop.

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My issue and solution.


102 1499a Chamberlain LiftMaster Security Plus + 1/2 HP

I have the 1499a same as the 1355

http://www.liftmaster.com/lmcv2/pages/productmodeldetail.aspx?modelId=9578 See pg 35 of pdf

The user guide or manual has the answer . Error - Door opens but doesn't close with the remote. OR Door doesn't close, hold the doorbell (wall) button.

My issue the sensor it had a short, one of the wires broke. I stripped it and reconnect the break. Very simple, once that was done the led lit up. The light would blink 10 times prior to correcting the short. The copper wiring is very thin. When I wrapped the copper around the terminal point it broke but the casing was still over the wire I couldn't see the break. Secondly I needed to program the remote I pressed the "learn" and then I pressed the remote button the light blinked once and it was done.


Posted on Aug 18, 2012

  • Mike Aug 18, 2012

    My issue and solution.





    102 1499a Chamberlain LiftMaster Security Plus + 1/2 HP


    I have the 1499a same as the 1355


    http://www.liftmaster.com/lmcv2/pages/pr...
    See pg 35 of pdf


    The user guide or manual has the answer . Error - Door opens
    but doesn't close with the remote. OR Door doesn't close, hold the doorbell (wall)
    button.


    My issue the sensor it had a short, one of the wires broke. I
    stripped it and reconnect the break. Very simple, once that was done the led
    lit up. The light would blink 10 times prior to correcting the short. The
    copper wiring is very thin. When I wrapped the copper around the terminal point
    it broke but the casing was still over the wire I couldn't see the break. Secondly
    I needed to program the remote I pressed the "learn" and then I pressed the
    remote button the light blinked once and it was fixed.

    My issue and solution.


    102 1499a Chamberlain LiftMaster Security Plus + 1/2 HP

    I have the 1499a same as the 1355

    http://www.liftmaster.com/lmcv2/pages/productmodeldetail.aspx?modelId=9578 See pg 35 of pdf

    The user guide or manual has the answer . Error - Door opens but doesn't close with the remote. OR Door doesn't close, hold the doorbell (wall) button.

    My issue the sensor it had a short, one of the wires broke. I stripped it and reconnect the break. Very simple, once that was done the led lit up. The light would blink 10 times prior to correcting the short. The copper wiring is very thin. When I wrapped the copper around the terminal point it broke but the casing was still over the wire I couldn't see the break. Secondly I needed to program the remote I pressed the "learn" and then I pressed the remote button the light blinked once and it was fixed.

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Try adjusting the force knob a little at a time and see if that helps-- insatlled new springs and i had same problem- jacked up the fore a little and orks fine

Posted on Oct 01, 2009

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Remove the cover and check the drive gear. It is white nylon and is probably stripped.

Posted on Jun 23, 2009

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Sounds like the clutch in the motor is slipping, perhaps the chain is getting kinked on something. check to make sure there is nothing in the way of it and that it is on track going into the motor

Posted on Jun 23, 2009

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