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

2 Answers

Have to hold button down to close door in cold weather

I have the Chamberlain HBW0777 made 9/94 and as soon as the weather gets a little cold the garage door doesn’t want to close. It acts as if there is something blocking the sensors. I have to hold the button in until the door is down. My suspicion is that the sensor that keeps the door from closing on an object is bad and does not like the cold.
I’m pretty savvy with electronics, Is this something that can be repaired or Not worth it?

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  • matt wilson Jan 04, 2009

    Thanks for the response. I have checked that and they are in working condition and aligned. I think it has to do with the sensor that if the door hits something, it goes back up, so it wont crush whatever was in the way. In the summer time (Sunny or dark) it works without a hitch, but when it gets a little cold out, It will go part of the way down and in the winter, you can forget it! It starts to move and returns immediately. You have to hold the button in the garage or the button on the keypad out side until the door hits the floor. And once in a while it still tries to return I guess until it realizes that I ain't giving up!

  • matt wilson Jan 05, 2009

    You da man! Thanks for stickin in there with me. One of the sensors were off a bit. I thought I had checked them. Problem solved. You truley are the "Door Tech"!

  • Anonymous Jan 05, 2009

    this is the second winter that my garage door doesn't go down. It starts the desent and then goes back. Sometimes when I hold the bottom down in the garage or the remote, it will complete the desent. Why does cold weather contribute to this problem?

  • wontletme Jan 05, 2009

    I have the same problem. The door doesn't go down most of the time in the winter unless I hold down the remote or inside button.

  • imspb Jan 06, 2009

    I have the very same problem - but the lights on the sensors both seem to be on - so I actually disconnected the sensors and gave it a shot. It still doesn't work in the cold weather with the sensors disconnected and the door jerks like crazy and reverses - and the light still flashes.

  • Anonymous Mar 20, 2009

    have to hold the button down to close but opens fine.

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You have a photo eye (sensor) issue as you suspected. Be sure both green lights are on.  If one is flashing or is off, the photo eyes need to be realigned or there may be a wire shorting out (check for staples in the wire) to the photo eyes.  Sunlight can also be an issue.  The photo eyes might have to be moved away from the opening to be out of the sunlight.

Posted on Jan 01, 2009

  • Joseph Chapman
    Joseph Chapman Jan 04, 2009

    The away that Chamberlain is designed holding either the wall
    button or the keypad will only override the photo eyes. If you run the
    door and watch the photo eyes closely I believe you will notice one of
    them flicker (this might take three people).


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I had the same problem. I checked the photo sensors and noticed one was bent. I strightened it out. Problem fixed. Thank You.

Bluebill

Posted on Jan 17, 2009

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Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+: My craftsman 1/2 hp garage dood does not close whe...


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