Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Logo
Posted on Jan 06, 2010
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Garage door will open, but will not close - Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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  • Master 3,197 Answers
  • Posted on Jan 06, 2010
Anonymous
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Joined: Apr 29, 2009
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Clear any obstruction from between the safety sensors. Loose leaves, trash, and dirt on the lens of the sensor itself are all examples of things that can obstruct the sensor's signal.

  1. Check each sensor for a steady glowing indicator light. If both indicator lights are on, or if one indicator light is flickering, the sensors may be slightly misaligned. To check for misalignment; obstruct the beam of the sensors so that they cannot see each other. When the beam is blocked, the indicator light on one of the two sensors will temporarily go out. This is the receiving sensor. Remove the obstruction and loosen the wing nut on the back of the receiving sensor. Adjust the receiving sensor until the green indicator light goes out, if not already out, then realign until the green light is bright and steady, then retighten the wing nut. This usually takes a couple of attempts before it is back in alignment.
  2. If an indicator light is out on one or both sensors, check for a possible loose or shorted wire. Sensor wires are attached to the white and black terminals on the back or side panel of the overhead motor unit. Check that they are securely connected to each terminal. Also check the wires for any breaks, especially anywhere they are spliced together.


5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Apr 14, 2008

SOURCE: garage door opener troubleshooting

Try backing off door travel ajustment,

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Vince Heuser

  • 118 Answers
  • Posted on Jan 19, 2009

SOURCE: Key pad won't open garage door

You probably have an eletrical device that is messing with frequency. Make sure that everything is off inside garage.

glenmann62

Glenn Mayer

  • 91 Answers
  • Posted on Mar 06, 2009

SOURCE: garage door

you possibly have a remote control that has a key stuck in ,locate all your remotes and check for that first , also i have seen first hand doors opening by themselves ,the older ones had 3 frequencys that they went by 308-310-312 now theese are the 40 year old machines and if you live close to a police station /fire station/or airport ,these facilties broadcast in the same frequency and all they have to do is key the microphone or radio and they send a signal , well that got to be crazy so the garage opener co,s decided to have their remotes on a different frequency and this worked fine ,now we have multi code systems that are in the billions ,now we have rolling code technology ,another way to fix your problem if you don,t have a sticky remote key is replace the logic board ,and that will defietly solve your issue , logic boards to go bad and do things that are not normal operation to the machine , i would like to know more about your machine because you did,nt state what brand or how old it is and i would be able to give you better advice if i knew more about the issue , does it open at different times of the day , does it do it everyday ,or just sometimes ,do you keep a remote in your pocket ? the reason i am asking is because i had a customer call me about his door being open in the morning when he came out of the house , I found that to be that when he sat down to watch television at night he had a keychain remote in pocket and everytime he sat down one of the keys would press up against the remote and open his door ,so when he came out in the morning he would see it open when he knew he had closed it the night before , that one took a little detective work but i solved the problem , Hope i was able to help you and feel free to contact me again if you don,t find the problem , i you feel i was helpful please leave a nice rating , thank you glenn

Anonymous

  • 3197 Answers
  • Posted on Apr 30, 2009

SOURCE: My garage door opener won't close the garage door.

Most likely your door sensors have been bumped and are not aligned properly. Make sure they are pointed at one another and the small light on each one is lit and not blinking.

Anonymous

  • 244 Answers
  • Posted on Dec 29, 2009

SOURCE: garage door will not shut with remotes.

Align sensors or replace,

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